SGV KHOA HOC 4

["\u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi: \u0110i\u00ea\u0300u gi\u0300 se\u0303 xa\u0309y ra v\u01a1\u0301i m\u1ed7i ba\u0323n trong hi\u0300nh 1 v\u00e0 2? \u2013 GV y\u00eau c\u1ea7u HS d\u1ef1 \u0111o\u00e1n ca\u0301c ti\u0300nh hu\u00f4\u0301ng c\u00f3 th\u1ec3 x\u1ea3y ra v\u01a1\u0301i 2 ba\u0323n \u01a1\u0309 trong hi\u0300nh. GV m\u1eddi HS tr\u1ea3 l\u1eddi. \u2013 GV nh\u1eadn x\u00e9t chung, gi\u1ea3i th\u00edch cho HS: N\u00ea\u0301u \u0103n i\u0301t c\u01a1m va\u0300 th\u01b0\u0301c \u0103n se\u0303 m\u1eafc b\u00ea\u0323nh suy dinh d\u01b0\u01a1\u0303ng; ng\u01b0\u01a1\u0323c la\u0323i \u0103n qua\u0301 nhi\u00ea\u0300u \u0111\u00f4\u0300 chi\u00ean, ra\u0301n, u\u00f4\u0301ng n\u01b0\u01a1\u0301c ngo\u0323t co\u0301 ga thi\u0300 se\u0303 m\u0103\u0301c b\u00ea\u0323nh be\u0301o phi\u0300,... \u2013 GV d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc: \u201cM\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng\u201d. Ho\u1ea1t \u0111\u1ed9ng 1: T\u00ecm hi\u1ec3u m\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec * M\u1ee5c ti\u00eau: HS nh\u00e2\u0323n bi\u00ea\u0301t \u0111\u01b0\u1ee3c m\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t va\u0300 \u0111o\u0323c th\u00f4ng tin trong h\u00ecnh 3 (SGK, trang 103) va\u0300 tra\u0309 l\u01a1\u0300i c\u00e1c c\u00e2u ho\u0309i: + Nh\u1eefng d\u1ea5u hi\u1ec7u, nguy\u00ean nh\u00e2n cu\u0309a b\u00ea\u0323nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec la\u0300 gi\u0300? + Theo em, b\u00ea\u0323nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec c\u00f3 th\u1ec3 g\u00e2y ra nh\u01b0\u0303ng h\u00e2\u0323u qua\u0309 gi\u0300? \u2013 GV m\u1eddi 2 \u2013 3 c\u1eb7p HS l\u00ean b\u1ea3ng tr\u00ecnh b\u00e0y nguy\u00ean nh\u00e2n, d\u00e2\u0301u hi\u00ea\u0323u va\u0300 h\u00e2\u0323u qua\u0309 cu\u0309a b\u00ea\u0323nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec. \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau, GV khen ng\u01a1\u0323i nho\u0301m co\u0301 c\u00e2u tra\u0309 l\u01a1\u0300i t\u00f4\u0301t, b\u00f4\u0309 sung th\u00eam cho nh\u01b0\u0303ng HS ch\u01b0a t\u00f4\u0301t. * K\u1ebft lu\u1eadn: N\u00ea\u0301u chu\u0301ng ta \u0103n qua\u0301 nhi\u00ea\u0300u nh\u01b0ng la\u0323i i\u0301t v\u00e2\u0323n \u0111\u00f4\u0323ng thi\u0300 m\u01a1\u0303 trong c\u01a1 th\u00ea\u0309 se\u0303 ti\u0301ch tu\u0323 nga\u0300y ca\u0300ng nhi\u00ea\u0300u, g\u00e2y n\u00ean b\u1ec7nh be\u0301o phi\u0300. Ngoa\u0300i ra, b\u00ea\u0323nh be\u0301o phi\u0300 co\u0300n do y\u1ebfu t\u1ed1 di truy\u1ec1n trong gia \u0111\u00ecnh: n\u00ea\u0301u cha ho\u1eb7c m\u1eb9 ho\u1eb7c c\u1ea3 hai \u0111\u1ec1u b\u00e9o ph\u00ec th\u00ec nguy c\u01a1 con c\u00e1i b\u1ecb th\u1eeba c\u00e2n s\u1ebd r\u1ea5t cao,... Ng\u01b0\u01a1\u0300i th\u01b0\u0300a c\u00e2n, be\u0301o phi\u0300 co\u0301 nguy c\u01a1 m\u0103\u0301c b\u00ea\u0323nh v\u00ea\u0300 tim ma\u0323ch, ti\u00ea\u0309u \u0111\u01b0\u01a1\u0300ng, huy\u00ea\u0301t a\u0301p cao, ung th\u01b0,... Ho\u1ea1t \u0111\u1ed9ng 2: Nh\u1eadn bi\u1ebft m\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh do thi\u00ea\u0301u ch\u00e2\u0301t dinh d\u01b0\u01a1\u0303ng * M\u1ee5c ti\u00eau: HS nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c m\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh do thi\u00ea\u0301u ch\u00e2\u0301t dinh d\u01b0\u01a1\u0303ng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV co\u0301 th\u00ea\u0309 t\u00f4\u0309 ch\u01b0\u0301c tro\u0300 ch\u01a1i \u0111o\u0301ng vai \u201cB\u00ea\u0323nh nh\u00e2n va\u0300 Ba\u0301c si\u0303\u201d, y\u00eau c\u1ea7u HS quan s\u00e1t h\u00ecnh 4, 5, 6 (SGK, trang 104) va\u0300 \u0111\u1eb7t ra y\u00eau c\u1ea7u: + K\u00ea\u0309 t\u00ean m\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh do thi\u00ea\u0301u ch\u00e2\u0301t dinh d\u01b0\u01a1\u0303ng co\u0301 trong c\u00e1c hi\u0300nh. + N\u00eau nh\u01b0\u0303ng d\u00e2\u0301u hi\u00ea\u0323u, nguy\u00ean nh\u00e2n cu\u0309a b\u00ea\u0323nh do thi\u00ea\u0301u ch\u00e2\u0301t dinh d\u01b0\u01a1\u0303ng. G\u1ee3i \u00fd: + Hi\u0300nh 4: B\u00ea\u0323nh suy dinh d\u01b0\u01a1\u0303ng th\u1ea5p c\u00f2i. + Hi\u0300nh 5: B\u00ea\u0323nh thi\u1ebfu m\u00e1u thi\u1ebfu s\u1eaft. + Hi\u0300nh 6: B\u00ea\u0323nh b\u01b0\u01a1\u0301u c\u00f4\u0309. \u2013 GV m\u1eddi 2 \u2013 3 c\u1eb7p HS l\u00ean chia s\u1ebb tr\u01b0\u1edbc l\u1edbp v\u1ec1 b\u1ed1n b\u1ec7nh v\u1eeba h\u1ecdc v\u00e0 k\u1ec3 th\u00eam m\u1ed9t s\u1ed1 b\u1ec7nh kh\u00e1c. \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau, GV khen ng\u01a1\u0323i nho\u0301m co\u0301 c\u00e2u tra\u0309 l\u01a1\u0300i t\u00f4\u0301t, b\u00f4\u0309 sung th\u00eam cho nh\u01b0\u0303ng HS ch\u01b0a t\u00f4\u0301t. 150","* K\u1ebft lu\u1eadn: Ch\u1ebf \u0111\u1ed9 \u0103n u\u1ed1ng kh\u00f4ng h\u1ee3p l\u00ed: \u0103n qu\u00e1 nhi\u1ec1u ch\u1ea5t b\u1ed9t \u0111\u01b0\u1eddng, ch\u1ea5t b\u00e9o ho\u1eb7c \u0103n thi\u1ebfu ch\u1ea5t \u0111\u1ea1m, thi\u1ebfu vi-ta-min v\u00e0 ch\u1ea5t kho\u00e1ng d\u1eabn \u0111\u1ebfn c\u01a1 th\u1ec3 m\u1eafc c\u00e1c b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng nh\u01b0 th\u1eeba c\u00e2n b\u00e9o ph\u00ec, suy dinh d\u01b0\u1ee1ng th\u1ea5p c\u00f2i, thi\u1ebfu m\u00e1u thi\u1ebfu s\u1eaft, b\u01b0\u1edbu c\u1ed5,\u2026 Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 vi\u1ebft, v\u1ebd nguy\u00ean nh\u00e2n, d\u1ea5u hi\u1ec7u m\u1eafc b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng. Ti\u1ebft 2 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 m\u00f4\u0323t s\u00f4\u0301 b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng \u0111\u1ec3 d\u1eabn d\u1eaft v\u00e0o ti\u1ebft h\u1ecdc m\u1edbi. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS ch\u01a1i tr\u00f2 ch\u01a1i \u201cT\u00f4i l\u00e0 ai\u201d: GV t\u1ed5 ch\u1ee9c cho t\u1eebng c\u1eb7p HS th\u1ef1c hi\u1ec7n, trong \u0111\u00f3 m\u1ed9t HS m\u00f4 t\u1ea3 b\u1ec7nh, m\u1ed9t HS tr\u1ea3 l\u1eddi t\u00ean b\u1ec7nh. V\u00ed d\u1ee5: HS A n\u00f3i: \u201cT\u00f4i c\u00f3 c\u00e2n n\u1eb7ng v\u00e0 chi\u1ec1u cao th\u1ea5p h\u01a1n m\u1ee9c trung b\u00ecnh\u2026\u201d. HS B tr\u1ea3 l\u1eddi: \u201cB\u1ea1n l\u00e0 b\u1ec7nh suy dinh d\u01b0\u1ee1ng th\u1ea5p c\u00f2i\u201d. \u2013 GV c\u00f3 th\u1ec3 t\u1ed5 ch\u1ee9c cho HS thi v\u1edbi nhau, m\u1eddi l\u1ea7n l\u01b0\u1ee3t c\u00e1c HS \u0111\u00f3ng vai n\u00f3i v\u1ec1 d\u1ea5u hi\u1ec7u, nguy\u00ean nh\u00e2n c\u1ee7a b\u1ec7nh; HS kh\u00e1c tr\u1ea3 l\u1eddi t\u00ean b\u1ec7nh,\u2026 Ho\u1ea1t \u0111\u1ed9ng 1: T\u00ecm hi\u1ec3u c\u00e1c b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng qua s\u00e1ch, b\u00e1o ho\u1eb7c in-t\u01a1-n\u00e9t * M\u1ee5c ti\u00eau: Ki\u00ea\u0309m tra hi\u00ea\u0309u bi\u00ea\u0301t cu\u0309a HS v\u1ec1 t\u00ean, d\u00e2\u0301u hi\u00ea\u0323u va\u0300 nguy\u00ean nh\u00e2n g\u00e2y ra b\u00ea\u0323nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u01a1\u0303ng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nh\u00f3m 6, y\u00eau c\u1ea7u t\u01b0\u0300ng nho\u0301m quan s\u00e1t va\u0300 \u0111o\u0323c ca\u0301c th\u00f4ng tin trong ba\u0309ng (SGK, trang 105) va\u0300 hoa\u0300n tha\u0300nh ba\u0309ng va\u0300o gi\u00e2\u0301y A3. GV khuy\u1ebfn kh\u00edch HS s\u00e1ng t\u1ea1o, c\u00f3 th\u1ec3 v\u1ebd, vi\u1ebft theo s\u01a1 \u0111\u1ed3 t\u01b0 duy,\u2026 \u0111\u1ec3 ph\u00e1t tri\u1ec3n n\u0103ng l\u1ef1c c\u1ee7a t\u1eebng HS, kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i tr\u00ecnh b\u00e0y theo b\u1ea3ng. \u2013 GV m\u1eddi 2 \u2013 3 HS \u0111a\u0323i di\u00ea\u0323n nho\u0301m chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. \u2013 GV khen ng\u01a1\u0323i nh\u01b0\u0303ng HS co\u0301 c\u00e2u tra\u0309 l\u01a1\u0300i \u0111u\u0301ng, l\u01b0u loa\u0301t va\u0300 co\u0301 th\u00eam nh\u01b0\u0303ng y\u0301 m\u01a1\u0301i v\u00ea\u0300 d\u00e2\u0301u hi\u00ea\u0323u, nguy\u00ean nh\u00e2n g\u00e2y b\u00ea\u0323nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u01a1\u0303ng v\u00e0 tr\u00ecnh b\u00e0y s\u00e1ng t\u1ea1o. * K\u1ebft lu\u1eadn: C\u00e2\u0300n theo do\u0303i s\u01b0\u0301c kho\u1ebb, ca\u0301c d\u00e2\u0301u hi\u00ea\u0323u cu\u0309a c\u01a1 th\u00ea\u0309 \u0111\u00ea\u0309 \u0111i\u1ec1u tr\u1ecb k\u1ecbp th\u1eddi, c\u1ea7n kha\u0301m ba\u0301c si\u0303 va\u0300 co\u0301 ch\u00ea\u0301 \u0111\u00f4\u0323 dinh d\u01b0\u01a1\u0303ng phu\u0300 h\u01a1\u0323p. Ho\u1ea1t \u0111\u1ed9ng 2: X\u1eed l\u00ed t\u00ecnh hu\u1ed1ng * M\u1ee5c ti\u00eau: HS bi\u1ebft x\u1eed l\u00ed m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng li\u00ean quan t\u1edbi b\u1ec7nh dinh d\u01b0\u1ee1ng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS l\u00e0m vi\u1ec7c nh\u00f3m \u0111\u00f4i, t\u1ed5 ch\u1ee9c cho HS \u0111\u00f3ng vai v\u00e0 x\u1eed l\u00ed t\u00ecnh hu\u1ed1ng nh\u01b0 h\u00ecnh 7, 8 (SGK, trang 105). 151","\u2013 GV m\u1eddi 2 \u2013 3 nho\u0301m l\u00ean \u0111\u00f3ng vai v\u00e0 chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. \u2013 GV khen ng\u01a1\u0323i nh\u01b0\u0303ng HS co\u0301 c\u00e2u tra\u0309 l\u01a1\u0300i \u0111u\u0301ng, \u0111\u00f3ng vai t\u1ed1t, tr\u1ea3 l\u1eddi l\u01b0u loa\u0301t v\u00e0 tr\u00ecnh b\u00e0y s\u00e1ng t\u1ea1o. \u2013 GV cho HS \u0111\u1ecdc m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c v\u00e0 m\u1ee5c Em t\u00ecm hi\u1ec3u th\u00eam \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 n\u1ed9i dung \u0111\u00e3 h\u1ecdc. * K\u1ebft lu\u1eadn: C\u00e2\u0300n co\u0301 ch\u00ea\u0301 \u0111\u00f4\u0323 dinh d\u01b0\u01a1\u0303ng phu\u0300 h\u01a1\u0323p, h\u1ea1n ch\u1ebf \u0103n u\u1ed1ng \u0111\u1ed3 ng\u1ecdt; khi c\u01a1 th\u1ec3 c\u00f3 nh\u1eefng bi\u1ec3u hi\u1ec7n b\u1ea5t th\u01b0\u1eddng n\u00ean \u0111i kh\u00e1m b\u00e1c s\u0129 \u0111\u1ec3 ch\u1eefa tr\u1ecb k\u1ecbp th\u1eddi. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 v\u1ebd tranh v\u1ec1 c\u00e1c b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng nh\u01b0 b\u1ec7nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec, b\u1ec7nh suy dinh d\u01b0\u1ee1ng th\u1ea5p c\u00f2i, b\u1ec7nh thi\u1ebfu m\u00e1u thi\u1ebfu s\u1eaft, b\u1ec7nh b\u01b0\u1edbu c\u1ed5 v\u00e0 vi\u1ebft n\u1ed9i dung tuy\u00ean truy\u1ec1n b\u1ea1n b\u00e8, ng\u01b0\u1eddi th\u00e2n c\u1ea7n l\u00e0m g\u00ec \u0111\u1ec3 tr\u00e1nh m\u1eafc c\u00e1c b\u1ec7nh n\u00e0y. Ti\u1ebft 3 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u00ea\u0300 t\u00ecnh h\u00ecnh b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng \u1edf \u0111\u1ecba ph\u01b0\u01a1ng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV m\u01a1\u0300i m\u00f4\u0323t s\u00f4\u0301 HS no\u0301i v\u00ea\u0300 ti\u0300nh hi\u0300nh suy dinh d\u01b0\u01a1\u0303ng \u01a1\u0309 \u0111i\u0323a ph\u01b0\u01a1ng v\u00e0 gi\u1ea3i th\u00edch ta\u0323i sao la\u0323i co\u0301 ti\u0300nh tra\u0323ng \u0111o\u0301. GV \u0111\u1eb7t c\u00e2u h\u1ecfi: C\u00e2\u0300n la\u0300m gi\u0300 \u0111\u00ea\u0309 pho\u0300ng tra\u0301nh b\u00ea\u0323nh li\u00ean quan t\u01a1\u0301i dinh d\u01b0\u01a1\u0303ng? \u2013 GV nh\u1eadn x\u00e9t, khen ca\u0301c ba\u0323n tra\u0309 l\u01a1\u0300i \u0111u\u0301ng va\u0300 d\u1eabn d\u1eaft v\u00e0o ti\u1ebft 3 c\u1ee7a b\u00e0i h\u1ecdc. Ho\u1ea1t \u0111\u1ed9ng 1: C\u00e2\u0300n la\u0300m gi\u0300 \u0111\u00ea\u0309 pho\u0300ng b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng? * M\u1ee5c ti\u00eau: HS nh\u1eadn bi\u1ebft nh\u1eefng vi\u1ec7c, tho\u0301i quen c\u00e2\u0300n l\u00e0m ho\u0103\u0323c kh\u00f4ng n\u00ean la\u0300m \u0111\u00ea\u0309 pho\u0300ng b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t h\u00ecnh 9a, 9b, 9c, 10, 11 (SGK, trang 106), th\u1ea3o lu\u1eadn c\u1eb7p \u0111\u00f4i v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: + Em co\u0301 nh\u00e2\u0323n xe\u0301t gi\u0300 v\u00ea\u0300 vi\u00ea\u0323c la\u0300m cu\u0309a ca\u0301c ba\u0323n trong m\u00f4\u0303i hi\u0300nh? Nh\u01b0\u0303ng vi\u00ea\u0323c na\u0300o n\u00ean la\u0300m, kh\u00f4ng n\u00ean la\u0300m \u0111\u1ec3 ph\u00f2ng tr\u00e1nh b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng? Vi\u0300 sao? + Em ha\u0303y k\u00ea\u0309 th\u00eam m\u00f4\u0323t s\u00f4\u0301 vi\u00ea\u0323c n\u00ean la\u0300m va\u0300 kh\u00f4ng n\u00ean la\u0300m \u0111\u00ea\u0309 pho\u0300ng tra\u0301nh b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng. + Theo em, c\u1ea7n l\u00e0m g\u00ec \u0111\u1ec3 ph\u00f2ng tr\u00e1nh b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng? \u2013 GV m\u1eddi 2 \u2013 3 c\u1eb7p HS chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. \u2013 GV c\u00f3 th\u1ec3 g\u1ee3i m\u1edf \u0111\u1ec3 HS n\u00eau th\u00eam nh\u1eefng vi\u1ec7c kh\u00f4ng n\u00ean l\u00e0m ho\u0103\u0323c n\u00ean la\u0300m \u0111\u1ec3 pho\u0300ng tra\u0301nh b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng b\u1eb1ng c\u00e1ch cho HS quan s\u00e1t th\u00eam h\u00ecnh \u1ea3nh ho\u1eb7c xem phim. 152","\u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. GV khen ng\u01a1\u0323i nho\u0301m HS co\u0301 c\u00e2u tra\u0309 l\u01a1\u0300i t\u00f4\u0301t, sa\u0301ng ta\u0323o. \u2013 GV v\u00e0 HS c\u00f9ng nh\u1eadn x\u00e9t, r\u00fat ra k\u1ebft lu\u1eadn. * K\u1ebft lu\u1eadn: \u0110\u00ea\u0309 pho\u0300ng tra\u0301nh b\u00ea\u0323nh li\u00ean quan t\u01a1\u0301i dinh d\u01b0\u01a1\u0303ng, chu\u0301ng ta c\u00e2\u0300n: + S\u01b0\u0309 du\u0323ng \u0111a da\u0323ng, h\u01a1\u0323p li\u0301 ca\u0301c loa\u0323i th\u01b0\u0301c \u0103n, \u0111\u00f4\u0300 u\u00f4\u0301ng. + Th\u01b0\u01a1\u0300ng xuy\u00ean v\u00e2\u0323n \u0111\u00f4\u0323ng c\u01a1 th\u00ea\u0309 va\u0300 luy\u00ea\u0323n t\u00e2\u0323p th\u00ea\u0309 du\u0323c th\u00ea\u0309 thao. + Theo do\u0303i chi\u00ea\u0300u cao v\u00e0 c\u00e2n n\u0103\u0323ng, kha\u0301m s\u01b0\u0301c kho\u1ebb \u0111i\u0323nh ki\u0300,\u2026 Ho\u1ea1t \u0111\u1ed9ng 2: Em t\u1eadp l\u00e0m tuy\u00ean truy\u1ec1n vi\u00ean * M\u1ee5c ti\u00eau: HS \u00f4n luy\u00ea\u0323n la\u0323i toa\u0300n b\u00f4\u0323 ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c quan tro\u0323ng cu\u0309a ba\u0300i ho\u0323c; co\u0301 y\u0301 th\u01b0\u0301c tuy\u00ean truy\u00ea\u0300n pho\u0300ng ch\u00f4\u0301ng b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng va\u0300 \u0111i\u0323nh h\u01b0\u01a1\u0301ng ngh\u00ea\u0300 nghi\u00ea\u0323p cho HS. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nho\u0301m 4, y\u00eau c\u1ea7u c\u00e1c nh\u00f3m ve\u0303 tranh c\u00f4\u0309 \u0111\u00f4\u0323ng tuy\u00ean truy\u00ea\u0300n v\u00ea\u0300 pho\u0300ng tr\u00e1nh b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u01a1\u0303ng tr\u00ean gi\u00e2\u0301y A3 ho\u0103\u0323c A0 (tu\u1ef3 \u0111i\u00ea\u0300u ki\u00ea\u0323n cu\u0309a t\u01b0\u0300ng l\u01a1\u0301p, tr\u01b0\u01a1\u0300ng). \u2013 GV m\u1eddi \u0111a\u0323i di\u00ea\u0323n 2 \u2013 3 nho\u0301m l\u00ean \u0111o\u0301ng vai la\u0300 tuy\u00ean truy\u00ean vi\u00ean tr\u01b0\u1edbc l\u1edbp v\u00e0 v\u1eadn \u0111\u1ed9ng b\u1ea1n b\u00e8 c\u00f9ng th\u1ef1c hi\u1ec7n. \u2013 GV m\u01a1\u0300i HS ca\u0301c nho\u0301m kha\u0301c nh\u1eadn x\u00e9t. \u2013 GV khen ng\u01a1\u0323i HS co\u0301 kha\u0309 n\u0103ng tuy\u00ean truy\u00ea\u0300n t\u00f4\u0301t, t\u01b0\u0323 tin, sa\u0301ng ta\u0323o,... * K\u1ebft lu\u1eadn: C\u00e2\u0300n th\u01b0\u0323c hi\u00ea\u0323n sinh hoa\u0323t va\u0300 \u0103n u\u00f4\u0301ng \u0111i\u00ea\u0300u \u0111\u00f4\u0323, khoa ho\u0323c va\u0300 tuy\u00ean truy\u00ea\u0300n t\u01a1\u0301i ba\u0323n be\u0300, ng\u01b0\u01a1\u0300i th\u00e2n \u0111\u00ea\u0309 pho\u0300ng tra\u0301nh b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng. \u2013 GV g\u1ee3i \u00fd v\u00e0 d\u1eabn d\u1eaft \u0111\u1ec3 HS n\u00eau \u0111\u01b0\u1ee3c c\u00e1c t\u1eeb kho\u00e1 trong b\u00e0i: B\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng \u2013 B\u1ec7nh suy dinh d\u01b0\u1ee1ng th\u1ea5p c\u00f2i \u2013 B\u1ec7nh b\u01b0\u1edbu c\u1ed5 \u2013 B\u1ec7nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec \u2013 B\u1ec7nh thi\u1ebfu m\u00e1u thi\u1ebfu s\u1eaft. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc \u2013 GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 th\u1ef1c hi\u1ec7n nh\u1eefng vi\u00ea\u0323c la\u0300m \u0111\u00ea\u0309 pho\u0300ng tra\u0301nh ca\u0301c b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng nh\u01b0: suy dinh d\u01b0\u01a1\u0303ng, thi\u00ea\u0301u vi-ta-min, be\u0301o phi\u0300,... va\u0300 v\u00e2\u0323n \u0111\u00f4\u0323ng ba\u0323n be\u0300 co\u0301 y\u0301 th\u01b0\u0301c th\u01b0\u0323c hi\u00ea\u0323n ch\u00ea\u0301 \u0111\u00f4\u0323 \u0103n u\u00f4\u0301ng, sinh hoa\u0323t la\u0300nh ma\u0323nh, khoa ho\u0323c. \u2013 GV khuy\u00ea\u0301n khi\u0301ch HS ve\u0303 tranh tuy\u00ean truy\u00ea\u0300n v\u00ea\u0300 pho\u0300ng ch\u00f4\u0301ng b\u00ea\u0323nh li\u00ean quan \u0111\u00ea\u0301n dinh d\u01b0\u01a1\u0303ng \u0111\u00ea\u0309 tr\u01b0ng ba\u0300y \u01a1\u0309 g\u00f3c h\u1ecdc t\u1eadp c\u1ee7a l\u1edbp. 153","B\u00e0i 28. PH\u00d2NG TR\u00c1NH \u0110U\u1ed0I N\u01af\u1edaC (2 ti\u1ebft) I. Y\u00eau c\u1ea7u c\u1ea7n \u0111\u1ea1t Sau b\u00e0i h\u1ecdc, HS: \u2013 N\u00eau \u0111\u01b0\u1ee3c nh\u1eefng vi\u1ec7c n\u00ean v\u00e0 kh\u00f4ng n\u00ean l\u00e0m \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. \u2013 Th\u1ef1c h\u00e0nh luy\u1ec7n t\u1eadp k\u0129 n\u0103ng ph\u00e2n t\u00edch v\u00e0 ph\u00e1n \u0111o\u00e1n t\u00ecnh hu\u1ed1ng c\u00f3 nguy c\u01a1 d\u1eabn \u0111\u1ebfn \u0111u\u1ed1i n\u01b0\u1edbc v\u00e0 thuy\u1ebft ph\u1ee5c, v\u1eadn \u0111\u1ed9ng c\u00e1c b\u1ea1n tr\u00e1nh xa nh\u1eefng nguy c\u01a1 \u0111\u00f3. \u2013 Cam k\u1ebft th\u1ef1c hi\u1ec7n c\u00e1c nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i. II. \u0110\u1ed3 d\u00f9ng d\u1ea1y h\u1ecdc \u2013 GV: C\u00e1c h\u00ecnh trong b\u00e0i 28 SGK, gi\u1ea5y A4, A3 ho\u1eb7c A0. \u2013 HS: SGK, VBT. III. C\u00c1C Ho\u1ea1t \u0111\u1ed9ng d\u1ea1y h\u1ecdc Ti\u1ebft 1 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc \u0111\u1ec3 d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc m\u1edbi. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS quan sa\u0301t hi\u0300nh 1 (SGK, trang 107). \u2013 GV m\u1eddi m\u1ed9t s\u1ed1 HS tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: Em \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc b\u01a1i ch\u01b0a? Em th\u01b0\u1eddng \u0111\u1ebfn b\u1ec3 b\u01a1i v\u1edbi ai? Khi \u0111i b\u01a1i em chu\u1ea9n b\u1ecb nh\u1eefng g\u00ec? \u2013 GV nh\u1eadn x\u00e9t chung, gi\u1ea3i th\u00edch cho HS: Ch\u00fang ta c\u1ea7n bi\u1ebft b\u01a1i, khi \u0111i b\u01a1i c\u1ea7n ph\u1ea3i \u0111i c\u00f9ng ng\u01b0\u1eddi l\u1edbn,\u2026 \u2013 GV d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc: \u201cPh\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc\u201d. Ho\u1ea1t \u0111\u1ed9ng 1: C\u1ea7n l\u00e0m g\u00ec \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc? * M\u1ee5c ti\u00eau: N\u00eau \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 vi\u1ec7c n\u00ean v\u00e0 kh\u00f4ng n\u00ean l\u00e0m \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t v\u00e0 m\u00f4 t\u1ea3 c\u00e1c t\u00ecnh hu\u1ed1ng trong c\u00e1c h\u00ecnh 2, 3, 4, 5, 6, 7, 8a, 8b va\u0300 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi: + Nh\u1eefng vi\u1ec7c n\u00e0o n\u00ean l\u00e0m v\u00e0 kh\u00f4ng n\u00ean l\u00e0m trong c\u00e1c h\u00ecnh? Vi\u0300 sao? + Theo em, n\u00ean l\u00e0m g\u00ec v\u00e0 kh\u00f4ng n\u00ean l\u00e0m g\u00ec \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc? \u2013 GV m\u1eddi 2 \u2013 3 c\u1eb7p HS chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. 154","\u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. \u2013 GV co\u0301 th\u00ea\u0309 cung c\u1ea5p m\u1ed9t s\u1ed1 th\u00f4ng tin cho HS: + Ng\u01b0\u1eddi b\u1ecb \u0111u\u1ed1i n\u01b0\u1edbc c\u00f3 th\u1ec3 t\u1eed vong do n\u01b0\u1edbc tr\u00e0n v\u00e0o c\u01a1 quan h\u00f4 h\u1ea5p, l\u00e0m cho c\u00e1c c\u01a1 quan trong c\u01a1 th\u1ec3 b\u1ecb thi\u1ebfu kh\u00ed \u00f4-xi v\u00e0 c\u00e1c ch\u1ee9c n\u0103ng s\u1ed1ng c\u1ee7a c\u01a1 th\u1ec3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng. + Theo t\u1ed5 ch\u1ee9c Y t\u1ebf Th\u1ebf gi\u1edbi (WHO), \u01b0\u1edbc t\u00ednh cho t\u1edbi n\u0103m 2022, m\u1ed7i n\u0103m \u1edf Vi\u1ec7t Nam v\u1eabn c\u00f2n kho\u1ea3ng 2 000 tr\u1ebb em d\u01b0\u1edbi 16 tu\u1ed5i t\u1eed vong do \u0111u\u1ed1i n\u01b0\u1edbc. Ch\u00fang ta c\u1ea7n \u0111\u1ec1 cao c\u1ea3nh gi\u00e1c v\u00e0 c\u00f3 nh\u1eefng bi\u1ec7n ph\u00e1p an to\u00e0n \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. * K\u1ebft lu\u1eadn: \u0110\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc, em c\u1ea7n: + Lu\u00f4n m\u1eb7c \u00e1o phao khi \u0111i thuy\u1ec1n, \u0111i ca n\u00f4,\u2026 + Kh\u00f4ng \u0111\u00f9a ngh\u1ecbch g\u1ea7n ao, h\u1ed3, khu v\u1ef1c c\u00f3 n\u01b0\u1edbc s\u00e2u,\u2026 + B\u1ec3 ch\u1ee9a n\u01b0\u1edbc c\u1ea7n c\u00f3 n\u1eafp \u0111\u1eady. + Kh\u00f4ng l\u1ed9i qua s\u00f4ng, su\u1ed1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi tr\u1eddi m\u01b0a l\u0169,\u2026 + Khi th\u1ea5y ng\u01b0\u1eddi b\u1ecb \u0111u\u1ed1i n\u01b0\u1edbc, nhanh ch\u00f3ng g\u1ecdi ng\u01b0\u1eddi l\u1edbn \u0111\u1ebfn gi\u00fap v\u00e0 t\u00ecm v\u1eadt d\u1ee5ng nh\u01b0 s\u00e0o, d\u00e2y,\u2026 \u0111\u1ec3 n\u1ea1n nh\u00e2n b\u00e1m v\u00e0o. * Th\u00f4ng tin d\u00e0nh cho GV: M\u1ed9t s\u1ed1 ng\u01b0\u1eddi b\u1ecb ng\u1ea1t th\u1edf do n\u01b0\u1edbc v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng c\u1ee9u s\u1ed1ng. V\u00ec v\u1eady, chuy\u00ean gia y t\u1ebf \u0111\u00e3 d\u00f9ng thu\u1eadt ng\u1eef \u201c\u0111u\u1ed1i n\u01b0\u1edbc\u201d. Ho\u1ea1t \u0111\u1ed9ng 2: X\u1eed l\u00ed t\u00ecnh hu\u1ed1ng * M\u1ee5c ti\u00eau: Ki\u00ea\u0309m tra hi\u00ea\u0309u bi\u00ea\u0301t c\u1ee7a HS v\u1ec1 d\u00e2\u0301u hi\u00ea\u0323u nh\u00e2\u0323n bi\u00ea\u0301t m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng kh\u00f4ng an to\u00e0n, c\u00f3 th\u1ec3 x\u1ea3y ra \u0111u\u1ed1i n\u01b0\u1edbc. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nh\u00f3m 4, y\u00eau c\u1ea7u HS quan s\u00e1t, ph\u00e2n t\u00edch nh\u1eefng nguy c\u01a1 c\u00f3 th\u1ec3 x\u1ea3y ra \u0111\u1ed1i v\u1edbi hai t\u00ecnh hu\u1ed1ng trong h\u00ecnh 9, 10 (SGK, trang 108). \u2013 GV h\u01b0\u1edbng d\u1eabn m\u1ed9t n\u1eeda nh\u00f3m \u0111\u00f3ng vai t\u00ecnh hu\u1ed1ng \u1edf h\u00ecnh 9, s\u1ed1 nh\u00f3m c\u00f2n l\u1ea1i \u0111\u00f3ng vai t\u00ecnh hu\u1ed1ng \u1edf h\u00ecnh 10. \u2013 GV m\u1eddi \u0111\u1ea1i di\u1ec7n c\u00e1c nh\u00f3m l\u00ean b\u1ea3ng \u0111\u00f3ng vai v\u00e0 th\u1ea3o lu\u1eadn, ph\u00e2n t\u00edch v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi nh\u01b0 trong SGK: + \u0110i\u1ec1u g\u00ec c\u00f3 th\u1ec3 x\u1ea3y ra trong c\u00e1c t\u00ecnh hu\u1ed1ng? + Em s\u1ebd v\u1eadn \u0111\u1ed9ng c\u00e1c b\u1ea1n tr\u00e1nh xa nh\u1eefng nguy c\u01a1 \u0111\u00f3 nh\u01b0 th\u1ebf n\u00e0o? \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. GV khen ng\u01a1\u0323i nh\u01b0\u0303ng nh\u00f3m \u0111\u00f3ng vai v\u00e0 x\u1eed l\u00ed t\u00ecnh hu\u1ed1ng sa\u0301ng ta\u0323o,... * K\u1ebft lu\u1eadn: Kh\u00f4ng \u0111i qua s\u00f4ng, su\u1ed1i khi n\u01b0\u1edbc l\u0169, kh\u00f4ng \u0111\u00f9a ngh\u1ecbch khi \u0111i qua s\u00f4ng su\u1ed1i ho\u1eb7c c\u00e1c v\u0169ng ch\u1ee9a n\u01b0\u1edbc. Kh\u00f4ng v\u1edbi tay c\u1ed1 l\u1ea5y c\u00e1c v\u1eadt \u1edf d\u01b0\u1edbi n\u01b0\u1edbc m\u00e0 kh\u00f4ng bi\u1ebft b\u01a1i,\u2026 Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS vi\u1ebft v\u00e0o v\u1edf nh\u1eefng vi\u1ec7c n\u00ean l\u00e0m v\u00e0 kh\u00f4ng n\u00ean l\u00e0m \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. 155","Ti\u1ebft 2 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV m\u1eddi m\u1ed9t s\u1ed1 HS chia s\u1ebb v\u1ec1 kinh nghi\u1ec7m khi \u0111\u1ebfn b\u1ec3 b\u01a1i, nh\u1eefng v\u1eadt d\u1ee5ng c\u1ea7n mang theo khi \u0111\u1ebfn b\u1ec3 b\u01a1i. \u2013 GV m\u1eddi m\u1ed9t s\u1ed1 HS kh\u00e1c b\u1ed5 sung, nh\u1eadn x\u00e9t, khen ca\u0301c em \u0111\u00e3 tra\u0309 l\u01a1\u0300i \u0111u\u0301ng va\u0300 d\u1eabn d\u1eaft v\u00e0o ti\u1ebft 2 c\u1ee7a b\u00e0i h\u1ecdc. Ho\u1ea1t \u0111\u1ed9ng 1: T\u00ecm hi\u1ec3u m\u1ed9t s\u1ed1 nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i * M\u1ee5c ti\u00eau: HS nh\u00e2\u0323n bi\u00ea\u0301t m\u1ed9t s\u1ed1 nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i, t\u1eeb \u0111\u00f3 bi\u1ebft v\u00e0 cam k\u1ebft th\u1ef1c hi\u1ec7n c\u00e1c nguy\u00ean t\u1eafc \u0111\u00f3. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS quan s\u00e1t h\u00ecnh 11, 12, 13, 14 (SGK, trang 109) va\u0300 tra\u0309 l\u01a1\u0300i c\u00e2u ho\u0309i: + Nh\u1eefng vi\u1ec7c n\u00e0o n\u00ean l\u00e0m v\u00e0 kh\u00f4ng n\u00ean l\u00e0m khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i? V\u00ec sao? + \u0110\u1ec3 an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i, ch\u00fang ta c\u1ea7n tu\u00e2n theo nh\u1eefng nguy\u00ean t\u1eafc n\u00e0o? \u2013 GV c\u1ea7n h\u01b0\u1edbng d\u1eabn HS quan s\u00e1t k\u0129 t\u1eebng chi ti\u1ebft trong h\u00ecnh \u0111\u1ec3 kh\u00e1i qu\u00e1t ho\u00e1 \u0111\u01b0\u1ee3c c\u00e1c nguy\u00ean t\u1eafc b\u01a1i an to\u00e0n. GV c\u00f3 th\u1ec3 \u0111\u1eb7t th\u00eam c\u00e2u h\u1ecfi ph\u1ee5 \u0111\u1ec3 HS hi\u1ec3u r\u00f5 m\u1ee5c ti\u00eau, ph\u00e1t tri\u1ec3n n\u0103ng l\u1ef1c quan s\u00e1t, ph\u00e2n t\u00edch: Trong h\u00ecnh c\u00f3 nh\u1eefng chi ti\u1ebft c\u1ea7n ch\u00fa \u00fd n\u00e0o? \u2013 GV m\u01a1\u0300i \u0111a\u0323i di\u00ea\u0323n m\u00f4\u0323t s\u00f4\u0301 HS m\u00f4 ta\u0309, ph\u00e2n t\u00edch \u00fd ngh\u0129a c\u00e1c chi ti\u1ebft trong t\u1eebng h\u00ecnh v\u00e0 n\u00eau c\u00e1c nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i. \u2013 GV v\u00e0 HS c\u00f9ng nh\u1eadn x\u00e9t v\u00e0 r\u00fat ra k\u1ebft lu\u1eadn. \u2013 GV khen ng\u01a1\u0323i c\u00e1c ba\u0323n tra\u0309 l\u01a1\u0300i \u0111u\u0301ng, sa\u0301ng ta\u0323o. * K\u1ebft lu\u1eadn: \u2013 M\u1ed9t s\u1ed1 nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i: + B\u01a1i t\u1ea1i b\u1ec3 b\u01a1i d\u00e0nh cho tr\u1ebb em. + \u0110i b\u01a1i c\u00f9ng ng\u01b0\u1eddi l\u1edbn. + B\u01a1i t\u1ea1i nh\u1eefng b\u1ec3 b\u01a1i c\u00f3 phao c\u1ee9u sinh, s\u00e0o c\u1ee9u h\u1ed9 v\u00e0 c\u00f3 s\u1ef1 gi\u00e1m s\u00e1t c\u1ee7a ng\u01b0\u1eddi c\u1ee9u h\u1ed9. \u2013 Ngo\u00e0i ra, GV c\u0169ng l\u01b0u \u00fd HS: + Kh\u00f4ng b\u01a1i khi c\u01a1 th\u1ec3 \u0111ang ra nhi\u1ec1u m\u1ed3 h\u00f4i, khi v\u1eeba t\u1eafm n\u1eafng ho\u1eb7c v\u1eeba \u0103n no. + Kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ef1 \u00fd l\u1eb7n xu\u1ed1ng n\u01b0\u1edbc m\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c s\u1ef1 cho ph\u00e9p c\u1ee7a ng\u01b0\u1eddi gi\u00e1m s\u00e1t. + Kh\u00f4ng tham gia c\u1ee9u n\u1ea1n nh\u00e2n n\u1ebfu kh\u00f4ng bi\u1ebft b\u01a1i v\u00e0 kh\u00f4ng bi\u1ebft c\u00e1ch c\u1ee9u \u0111u\u1ed1i n\u01b0\u1edbc. Ho\u1ea1t \u0111\u1ed9ng 2: X\u1eed l\u00ed t\u00ecnh hu\u1ed1ng * M\u1ee5c ti\u00eau: HS bi\u1ebft x\u1eed l\u00ed m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng b\u01a1i an to\u00e0n. 156","* C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nh\u00f3m 6, y\u00eau c\u1ea7u HS quan s\u00e1t, ph\u00e2n t\u00edch hai t\u00ecnh hu\u1ed1ng trong h\u00ecnh 15, 16 (SGK, trang 110). \u2013 GV h\u01b0\u1edbng d\u1eabn m\u1ed9t n\u1eeda nh\u00f3m \u0111\u00f3ng vai t\u00ecnh hu\u1ed1ng \u1edf h\u00ecnh 15, s\u1ed1 nh\u00f3m c\u00f2n l\u1ea1i \u0111\u00f3ng vai t\u00ecnh hu\u1ed1ng \u1edf h\u00ecnh 16. \u2013 GV m\u1eddi \u0111\u1ea1i di\u1ec7n c\u00e1c nh\u00f3m l\u00ean b\u1ea3ng \u0111\u00f3ng vai v\u00e0 th\u1ea3o lu\u1eadn, ph\u00e2n t\u00edch v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi nh\u01b0 trong SGK: Em s\u1ebd khuy\u00ean b\u1ea1n \u0111i\u1ec1u g\u00ec trong m\u1ed7i t\u00ecnh hu\u1ed1ng? \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. GV khen ng\u01a1\u0323i nh\u01b0\u0303ng nh\u00f3m \u0111\u00f3ng vai v\u00e0 x\u1eed l\u00ed t\u00ecnh hu\u1ed1ng sa\u0301ng ta\u0323o,... * K\u1ebft lu\u1eadn: M\u1ed7i ch\u00fang ta c\u1ea7n h\u1ecdc b\u01a1i \u0111\u1ec3 bi\u1ebft b\u01a1i, v\u1eeba r\u00e8n luy\u1ec7n s\u1ee9c kho\u1ebb, v\u1eeba c\u00f3 th\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. Ngo\u00e0i ra, c\u1ea7n th\u1ef1c hi\u1ec7n c\u00e1c nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i. Ho\u1ea1t \u0111\u1ed9ng 3: Em t\u1eadp l\u00e0m tuy\u00ean truy\u1ec1n vi\u00ean * M\u1ee5c ti\u00eau: HS \u00f4n luy\u00ea\u0323n la\u0323i toa\u0300n b\u00f4\u0323 ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c quan tro\u0323ng cu\u0309a ba\u0300i ho\u0323c; b\u01b0\u01a1\u0301c \u0111\u00e2\u0300u t\u00e2\u0323p la\u0300m tuy\u00ean truy\u00ea\u0300n vi\u00ean nh\u0103\u0300m ph\u00e1t tri\u1ec3n n\u0103ng l\u1ef1c thuy\u00ea\u0301t tri\u0300nh, di\u00ea\u0303n gia\u0309 tr\u01b0\u01a1\u0301c \u0111a\u0301m \u0111\u00f4ng, co\u0301 y\u0301 th\u01b0\u0301c tuy\u00ean truy\u00ea\u0300n pho\u0300ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS th\u1ea3o lu\u1eadn, tr\u00ecnh b\u00e0y m\u1ed9t s\u1ed1 nguy\u00ean t\u1eafc an to\u00e0n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i. GV \u0111\u1eb7t c\u00e2u h\u1ecfi cho HS: Em v\u00e0 m\u1ecdi ng\u01b0\u1eddi xung quanh \u0111\u00e3 l\u00e0m g\u00ec \u0111\u1ec3 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc? \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nho\u0301m 6, y\u00eau c\u1ea7u HS ve\u0303, vi\u1ebft b\u1ea3n \u201cCam k\u1ebft th\u1ef1c hi\u1ec7n nguy\u00ean t\u1eafc b\u01a1i an to\u00e0n\u201d tr\u00ean kh\u00f4\u0309 gi\u00e2\u0301y A3 ho\u0103\u0323c A4, A0 (tu\u1ef3 \u0111i\u00ea\u0300u ki\u00ea\u0323n cu\u0309a t\u01b0\u0300ng l\u01a1\u0301p, tr\u01b0\u01a1\u0300ng). \u2013 GV y\u00eau c\u1ea7u HS th\u1ea3o lu\u1eadn nh\u00f3m v\u00e0 hoa\u0300n tha\u0300nh b\u1ea3n cam k\u1ebft. \u2013 GV m\u1eddi \u0111a\u0323i di\u00ea\u0323n 2 \u2013 3 nho\u0301m l\u00ean \u0111\u00f3ng vai l\u00e0 tuy\u00ean truy\u1ec1n vi\u00ean, tri\u0300nh ba\u0300y sa\u0309n ph\u00e2\u0309m cu\u0309a nho\u0301m tr\u01b0\u1edbc l\u1edbp, \u0111\u1ed3ng th\u1eddi v\u1eadn \u0111\u1ed9ng b\u1ea1n b\u00e8, ng\u01b0\u1eddi th\u00e2n c\u00f9ng th\u1ef1c hi\u1ec7n. \u2013 GV m\u01a1\u0300i HS ca\u0301c nho\u0301m kha\u0301c nh\u1eadn x\u00e9t. \u2013 GV khen ng\u01a1\u0323i nho\u0301m co\u0301 b\u1ea3n cam k\u1ebft chi\u0301nh xa\u0301c, chi ti\u00ea\u0301t va\u0300 tr\u00ecnh b\u00e0y sa\u0301ng ta\u0323o,... * K\u1ebft lu\u1eadn: C\u1ea7n th\u1ef1c hi\u1ec7n v\u00e0 tuy\u00ean truy\u1ec1n t\u1edbi b\u1ea1n b\u00e8, ng\u01b0\u1eddi th\u00e2n c\u00f9ng ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. \u2013 GV g\u1ee3i \u00fd v\u00e0 d\u1eabn d\u1eaft \u0111\u1ec3 HS n\u00eau \u0111\u01b0\u1ee3c c\u00e1c t\u1eeb kho\u00e1 trong b\u00e0i: \u0110u\u1ed1i n\u01b0\u1edbc \u2013 Nguy\u00ean t\u1eafc b\u01a1i an to\u00e0n. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc \u2013 GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 th\u1ef1c hi\u1ec7n nh\u1eefng vi\u00ea\u0323c la\u0300m \u0111a\u0309m ba\u0309o an toa\u0300n khi b\u01a1i ho\u1eb7c t\u1eadp b\u01a1i, v\u00e2\u0323n \u0111\u00f4\u0323ng ng\u01b0\u01a1\u0300i th\u00e2n va\u0300 ba\u0323n be\u0300 co\u0301 y\u0301 th\u01b0\u0301c \u0111a\u0309m ba\u0309o an toa\u0300n cho ba\u0309n th\u00e2n, gia \u0111i\u0300nh va\u0300 c\u00f4\u0323ng \u0111\u00f4\u0300ng. \u2013 GV khuy\u00ea\u0301n khi\u0301ch HS ve\u0303 tranh tuy\u00ean truy\u00ea\u0300n v\u00ea\u0300 Ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc \u0111\u00ea\u0309 tr\u01b0ng ba\u0300y \u01a1\u0309 g\u00f3c h\u1ecdc t\u1eadp c\u1ee7a l\u1edbp. 157","B\u00e0i 29. \u00d4N T\u1eacP CH\u1ee6 \u0110\u1ec0 CON NG\u01af\u1edcI V\u00c0 S\u1ee8C KHO\u1eba (1 ti\u1ebft) I. Y\u00caU C\u1ea6U C\u1ea6N \u0110\u1ea0T Sau b\u00e0i h\u1ecdc, HS: C\u1ee7ng c\u1ed1, kh\u00e1i qu\u00e1t ho\u00e1 v\u00e0 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c, k\u0129 n\u0103ng h\u1ecdc \u0111\u01b0\u1ee3c trong ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb. II. \u0110\u1ed2 D\u00d9NG d\u1ea1y h\u1ecdc \u2013 GV: C\u00e1c h\u00ecnh trong b\u00e0i 29 SGK. \u2013 HS: SGK, VBT, h\u00ecnh ch\u1ee5p ho\u1eb7c tranh v\u1ebd v\u1ec1 c\u00e1c nh\u00f3m ch\u1ea5t dinh d\u01b0\u1ee1ng. III. C\u00c1C Ho\u1ea1t \u0111\u1ed9ng d\u1ea1y h\u1ecdc Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i \u0111\u1ec3 HS nh\u1edb l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc trong ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS h\u00e1t m\u1ed9t b\u00e0i h\u00e1t c\u00f3 n\u1ed9i dung c\u00f3 li\u00ean quan \u0111\u1ebfn ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb. V\u00ed d\u1ee5: B\u00e0i h\u00e1t \u201cChi\u1ebfc b\u1ee5ng \u0111\u00f3i\u201d. \u2013 GV nh\u1eadn x\u00e9t chung v\u00e0 d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc: \u201c\u00d4n t\u1eadp ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb\u201d. Ho\u1ea1t \u0111\u1ed9ng 1: S\u01a1 \u0111\u1ed3 ho\u00e1 * M\u1ee5c ti\u00eau: HS c\u1ee7ng c\u1ed1, \u00f4n t\u1eadp, kh\u00e1i qu\u00e1t ho\u00e1 ki\u1ebfn th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS ho\u1ea1t \u0111\u1ed9ng nh\u00f3m 6. GV y\u00eau c\u1ea7u m\u1ed7i nh\u00f3m tham kh\u1ea3o s\u01a1 \u0111\u1ed3 g\u1ee3i \u00fd trong SGK trang 117, th\u1ea3o lu\u1eadn nh\u00f3m v\u00e0 v\u1ebd, vi\u1ebft v\u1ec1 nh\u1eefng \u0111i\u1ec1u \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c sau ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb,\u2026 c\u1ee7a m\u00ecnh \u0111\u1ec3 ho\u00e0n th\u00e0nh s\u01a1 \u0111\u1ed3 kh\u00e1i qu\u00e1t \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc trong ch\u1ee7 \u0111\u1ec1 m\u1ed9t c\u00e1ch \u0111\u1ea7y \u0111\u1ee7 v\u00e0 \u0111\u1eb9p nh\u1ea5t. \u2013 GV quan s\u00e1t v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c nh\u00f3m ho\u00e0n th\u00e0nh s\u01a1 \u0111\u1ed3. \u2013 GV t\u1ed5 ch\u1ee9c cho c\u00e1c nh\u00f3m l\u00ean treo s\u1ea3n ph\u1ea9m v\u00e0 chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. \u2013 C\u00e1c nh\u00f3m kh\u00e1c nh\u1eadn x\u00e9t, b\u1ed5 sung. L\u01b0u \u00fd: GV khuy\u1ebfn kh\u00edch HS v\u1ebd, vi\u1ebft b\u1eb1ng s\u01a1 \u0111\u1ed3 t\u01b0 duy theo c\u00e1c c\u00e1ch s\u00e1ng t\u1ea1o kh\u00e1c nhau. * K\u1ebft lu\u1eadn: Ch\u1ee7 \u0111\u1ec1 Con ng\u01b0\u1eddi v\u00e0 s\u1ee9c kho\u1ebb cung c\u1ea5p c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 c\u00e1c nh\u00f3m ch\u1ea5t dinh d\u01b0\u1ee1ng v\u00e0 gi\u00e1 tr\u1ecb dinh d\u01b0\u1ee1ng c\u00f3 trong th\u1ee9c \u0103n; \u0103n u\u1ed1ng khoa h\u1ecdc; th\u1ef1c ph\u1ea9m an to\u00e0n; m\u1ed9t s\u1ed1 b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng; ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc,\u2026 \u0111\u1ec3 trang b\u1ecb cho HS c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 dinh d\u01b0\u1ee1ng v\u00e0 ch\u0103m s\u00f3c s\u1ee9c kho\u1ebb cho b\u1ea3n th\u00e2n v\u00e0 gia \u0111\u00ecnh. Ho\u1ea1t \u0111\u1ed9ng 2: Em t\u1eadp l\u00e0m b\u00e1c s\u0129 * M\u1ee5c ti\u00eau: HS c\u1ee7ng c\u1ed1, \u00f4n t\u1eadp ki\u1ebfn th\u1ee9c v\u1ec1 c\u00e1c b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng; Ph\u00e1t tri\u1ec3n n\u0103ng l\u1ef1c thuy\u1ebft tr\u00ecnh, l\u00e0m vi\u1ec7c nh\u00f3m v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng ngh\u1ec1 nghi\u1ec7p. 158","* C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nh\u00f3m 4 v\u00e0 giao nhi\u1ec7m v\u1ee5 cho m\u1ed7i nh\u00f3m: th\u1ea3o lu\u1eadn v\u1ec1 c\u00e1c b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng, \u0111\u00f3ng vai b\u00e1c s\u0129 v\u00e0 b\u1ec7nh nh\u00e2n \u0111\u1ec3 chia s\u1ebb v\u1ec1 c\u00e1c b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng. \u2013 GV m\u1eddi m\u1ed9t s\u1ed1 nh\u00f3m l\u00ean \u0111\u00f3ng vai v\u00e0 chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. \u2013 GV v\u00e0 HS c\u00f9ng nh\u1eadn x\u00e9t, r\u00fat ra k\u1ebft lu\u1eadn. * K\u1ebft lu\u1eadn: M\u1ed9t s\u1ed1 b\u1ec7nh li\u00ean quan \u0111\u1ebfn dinh d\u01b0\u1ee1ng nh\u01b0 b\u1ec7nh th\u1eeba c\u00e2n b\u00e9o ph\u00ec do \u0103n th\u1eeba ch\u1ea5t b\u00e9o, ch\u1ea5t b\u1ed9t \u0111\u01b0\u1eddng, ch\u1ea5t \u0111\u1ea1m, c\u01a1 th\u1ec3 \u00edt v\u1eadn \u0111\u1ed9ng; b\u1ec7nh suy dinh d\u01b0\u1ee1ng th\u1ea5p c\u00f2i do \u0103n thi\u1ebfu ho\u1eb7c c\u01a1 th\u1ec3 kh\u00f4ng h\u1ea5p thu \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng; b\u1ec7nh thi\u1ebfu m\u00e1u do ch\u1ebf \u0111\u1ed9 \u0103n thi\u1ebfu s\u1eaft; b\u1ec7nh b\u01b0\u1edbu c\u1ed5 do ch\u1ebf \u0111\u1ed9 \u0103n thi\u1ebfu i-\u1ed1t. Ho\u1ea1t \u0111\u1ed9ng 3: C\u00f9ng s\u00e1ng t\u1ea1o * M\u1ee5c ti\u00eau: HS c\u1ee7ng c\u1ed1, \u00f4n t\u1eadp ki\u1ebfn th\u1ee9c v\u1ec1 an to\u00e0n th\u1ef1c ph\u1ea9m, \u0103n u\u1ed1ng h\u1ee3p l\u00ed \u0111\u1ec3 c\u01a1 th\u1ec3 kho\u1ebb m\u1ea1nh, ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nh\u00f3m 6 v\u00e0 y\u00eau c\u1ea7u HS \u0111\u1ecdc n\u1ed9i dung y\u00eau c\u1ea7u c\u1ee7a c\u00e2u 3 trong SGK trang 117. \u2013 GV giao nhi\u1ec7m v\u1ee5 cho HS: M\u1ed7i nh\u00f3m s\u1ebd ch\u1ecdn vi\u1ebft, v\u1ebd tranh tuy\u00ean truy\u1ec1n v\u1ec1 ch\u1ee7 \u0111\u1ec1 \u201cAn to\u00e0n th\u1ef1c ph\u1ea9m\u201dho\u1eb7c\u201c\u0102n u\u1ed1ng h\u1ee3p l\u00ed \u0111\u1ec3 c\u01a1 th\u1ec3 kho\u1ebb m\u1ea1nh\u201dho\u1eb7c\u201cPh\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc\u201d. \u2013 GV quan s\u00e1t v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c nh\u00f3m l\u00e0m vi\u1ec7c. GV m\u1eddi \u0111\u1ea1i di\u1ec7n c\u00e1c nh\u00f3m chia s\u1ebb s\u1ea3n ph\u1ea9m c\u1ee7a nh\u00f3m m\u00ecnh tr\u01b0\u1edbc l\u1edbp. \u2013 GV v\u00e0 HS c\u00f9ng nh\u1eadn x\u00e9t, r\u00fat ra k\u1ebft lu\u1eadn. \u2013 GV khen ng\u1ee3i c\u00e1c nh\u00f3m c\u00f3 s\u1ea3n ph\u1ea9m \u0111\u00fang, ho\u00e0n ch\u1ec9nh v\u00e0 \u0111\u1eb9p; n\u1ed9i dung tuy\u00ean truy\u1ec1n hay. * K\u1ebft lu\u1eadn: C\u00f9ng chia s\u1ebb v\u1edbi c\u00e1c b\u1ea1n, gia \u0111\u00ecnh, c\u1ed9ng \u0111\u1ed3ng v\u1ec1 vi\u1ec7c th\u1ef1c hi\u1ec7n an to\u00e0n th\u1ef1c ph\u1ea9m, \u0103n u\u1ed1ng h\u1ee3p l\u00ed v\u00e0 ph\u00f2ng tr\u00e1nh \u0111u\u1ed1i n\u01b0\u1edbc \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u01a1 th\u1ec3 kho\u1ebb m\u1ea1nh. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS ho\u00e0n thi\u1ec7n c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u1ec3 tr\u01b0ng b\u00e0y \u1edf g\u00f3c s\u00e1ng t\u1ea1o c\u1ee7a l\u1edbp. 159","Chu\u00fb \u00f1e\u00e0 6: SINH VA\u00c4T VA\u00d8 MO\u00c2I TR\u00d6\u00d4\u00d8NG B\u00e0i 30. chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean (3 ti\u1ebft) I. Y\u00eau c\u1ea7u c\u1ea7n \u0111\u1ea1t Sau b\u00e0i h\u1ecdc, HS: \u2212 S\u1eed d\u1ee5ng \u0111\u01b0\u01a1\u0323c s\u01a1 \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 m\u00f4 t\u1ea3 sinh v\u1eadt n\u00e0y l\u00e0 th\u1ee9c \u0103n c\u1ee7a sinh v\u1eadt kh\u00e1c trong t\u1ef1 nhi\u00ean. \u2212 Tr\u00ecnh b\u00e0y \u0111\u01b0\u01a1\u0323c m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa c\u00e1c sinh v\u1eadt trong t\u1ef1 nhi\u00ean th\u00f4ng qua chu\u1ed7i th\u1ee9c \u0103n. \u2212 N\u00eau \u0111\u01b0\u01a1\u0323c v\u00ed d\u1ee5 v\u1ec1 chu\u1ed7i th\u1ee9c \u0103n. II. \u0110\u1ed3 d\u00f9ng d\u1ea1y h\u1ecdc \u2013 GV: C\u00e1c h\u00ecnh trong b\u00e0i 30 SGK, phi\u1ebfu h\u1ecdc t\u1eadp, d\u1ee5ng c\u1ee5 b\u1ea5m l\u1ed7 gi\u1ea5y, c\u00e1c th\u1ebb b\u00eca, d\u00e2y \u0111\u1ec3 bu\u1ed9c, m\u0169 c\u00f3 h\u00ecnh c\u00e1c sinh v\u1eadt. \u2013 HS: SGK, VBT, b\u00fat, b\u1ea3ng con, m\u0169. III. C\u00c1C Ho\u1ea1t \u0111\u1ed9ng d\u1ea1y h\u1ecdc Ti\u1ebft 1 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa con chu\u1ed9t v\u00e0 c\u00e2y ng\u00f4. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS quan s\u00e1t h\u00ecnh 1, 2 (SGK, trang 113) ho\u1eb7c GV c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c tranh v\u1ebd, video kh\u00e1c c\u00f3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt \u0111\u1ec3 t\u1ed5 ch\u1ee9c ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng. \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi: Con chu\u1ed9t \u0111ang l\u00e0m g\u00ec? C\u00e2y ng\u00f4, con chu\u1ed9t trong h\u00ecnh 1 v\u00e0 2 c\u00f3 m\u1ed1i li\u00ean h\u1ec7 v\u1edbi nhau nh\u01b0 th\u1ebf n\u00e0o? \u2013 GV m\u1eddi HS b\u1ea5t k\u00ec tr\u1ea3 l\u1eddi. \u2013 GV nh\u1eadn x\u00e9t chung v\u00e0 d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc: \u201cChu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean\u201d. Ho\u1ea1t \u0111\u1ed9ng 1: T\u00ecm hi\u1ec3u m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean * M\u1ee5c ti\u00eau: HS s\u1eed d\u1ee5ng \u0111\u01b0\u01a1\u0323c s\u01a1 \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 m\u00f4 t\u1ea3 sinh v\u1eadt n\u00e0y l\u00e0 th\u1ee9c \u0103n c\u1ee7a sinh v\u1eadt kh\u00e1c trong t\u1ef1 nhi\u00ean. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t h\u00ecnh 3, 4 (SGK, trang 113) (ho\u1eb7c c\u00e1c tranh, \u1ea3nh c\u1ee7a c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt kh\u00e1c). 160","\u2013 GV y\u00eau c\u1ea7u HS th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5: + Quan s\u00e1t v\u00e0 cho bi\u1ebft th\u1ee9c \u0103n c\u1ee7a m\u1ed7i con v\u1eadt trong c\u00e1c h\u00ecnh 3, 4. + N\u00f3i v\u1edbi b\u1ea1n v\u1ec1 \u00fd ngh\u0129a c\u1ee7a s\u01a1 \u0111\u1ed3 d\u01b0\u1edbi m\u1ed7i h\u00ecnh. M\u0169i t\u00ean trong m\u1ed7i s\u01a1 \u0111\u1ed3 c\u00f3 \u00fd ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o? G\u1ee3i \u00fd: + H\u00ecnh 3: Con tr\u00e2u \u0111ang \u0103n c\u1ecf. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y th\u1ee9c \u0103n c\u1ee7a con tr\u00e2u l\u00e0 c\u1ecf; H\u00ecnh 4: Con m\u00e8o v\u1eeba m\u1edbi b\u1eaft chu\u1ed9t, chu\u1ea9n b\u1ecb \u0103n th\u1ecbt con chu\u1ed9t. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y th\u1ee9c \u0103n c\u1ee7a con m\u00e8o l\u00e0 con chu\u1ed9t. + S\u01a1 \u0111\u1ed3 d\u01b0\u1edbi m\u1ed7i h\u00ecnh m\u00f4 t\u1ea3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n hay c\u00f2n g\u1ecdi l\u00e0 m\u1ed1i quan h\u1ec7 dinh d\u01b0\u1ee1ng gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt. M\u0169i t\u00ean trong m\u1ed7i s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa hai lo\u00e0i sinh v\u1eadt trong s\u01a1 \u0111\u1ed3. Lo\u00e0i sinh v\u1eadt \u0111\u1ee9ng tr\u01b0\u1edbc l\u00e0 th\u1ee9c \u0103n c\u1ee7a lo\u00e0i sinh v\u1eadt \u0111\u1ee9ng sau (quy \u01b0\u1edbc chi\u1ec1u m\u0169i t\u00ean t\u1eeb tr\u00e1i sang ph\u1ea3i bi\u1ec3u di\u1ec5n m\u1ed1i quan h\u1ec7 dinh d\u01b0\u1ee1ng, n\u1ebfu m\u0169i t\u00ean c\u00f3 chi\u1ec1u t\u1eeb ph\u1ea3i sang tr\u00e1i th\u00ec \u0111\u00f3 l\u00e0 m\u0169i t\u00ean ch\u1ec9 chi\u1ec1u t\u00e1c \u0111\u1ed9ng). \u2013 GV m\u1eddi 2 \u2013 3 HS chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. GV g\u1ee3i \u00fd \u0111\u1ec3 HS \u0111\u1ecdc s\u01a1 \u0111\u1ed3 theo m\u1eabu: \u201cSinh v\u1eadt \u0111\u1ee9ng tr\u01b0\u1edbc l\u00e0 th\u1ee9c \u0103n c\u1ee7a sinh v\u1eadt \u0111\u1ee9ng sau\u201d. V\u00ed d\u1ee5: Chu\u1ed9t l\u00e0 th\u1ee9c \u0103n c\u1ee7a m\u00e8o. \u2013 GV c\u00f9ng HS nh\u1eadn x\u00e9t v\u00e0 r\u00fat ra k\u1ebft lu\u1eadn. * K\u1ebft lu\u1eadn: Trong t\u1ef1 nhi\u00ean, sinh v\u1eadt n\u00e0y d\u00f9ng sinh v\u1eadt kh\u00e1c l\u00e0m th\u1ee9c \u0103n, t\u1ea1o n\u00ean m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa ch\u00fang. Ho\u1ea1t \u0111\u1ed9ng 2: V\u1ebd s\u01a1 \u0111\u1ed3 m\u00f4 t\u1ea3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n c\u1ee7a c\u00e1c sinh v\u1eadt * M\u1ee5c ti\u00eau: HS v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc \u0111\u1ec3 l\u1eadp s\u01a1 \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n m\u00f4 t\u1ea3 sinh v\u1eadt n\u00e0y l\u00e0 th\u1ee9c \u0103n c\u1ee7a sinh v\u1eadt kh\u00e1c trong t\u1ef1 nhi\u00ean. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS luy\u1ec7n t\u1eadp v\u1ebd s\u01a1 \u0111\u1ed3 m\u00f4 t\u1ea3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt c\u00f3 trong h\u00ecnh 5, 6, 7, 8 (SGK, trang 114) b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u0169i t\u00ean. GV c\u00f3 th\u1ec3 chu\u1ea9n b\u1ecb th\u00eam m\u1ed9t s\u1ed1 h\u00ecnh \u1ea3nh ho\u1eb7c video clip c\u00f3 th\u1ec3 hi\u1ec7n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c sinh v\u1eadt kh\u00e1c \u0111\u1ec3 HS luy\u1ec7n t\u1eadp th\u00eam n\u1ebfu c\u00f2n nhi\u1ec1u th\u1eddi gian. \u2013 GV m\u1eddi 1 \u2013 2 HS l\u00ean b\u1ea3ng v\u1ebd s\u01a1 \u0111\u1ed3 bi\u1ec5u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt c\u00f3 trong c\u00e1c h\u00ecnh 5, 6, 7, 8. \u2013 C\u00e1c HS c\u00f2n l\u1ea1i vi\u1ebft c\u00e2u tr\u1ea3 l\u1eddi v\u00e0o v\u1edf ho\u1eb7c b\u1ea3ng con. G\u1ee3i \u00fd: + Qu\u1ea3 \u0111\u00e0o \u2192 S\u00f3c; Ch\u00e2u ch\u1ea5u \u2192 T\u1eafc k\u00e8. + \u1ebech \u2192 R\u1eafn; C\u1ecf \u2192 B\u00f2. \u2013 GV t\u1ed5 ch\u1ee9c cho HS ho\u1ea1t \u0111\u1ed9ng theo nh\u00f3m \u0111\u00f4i v\u00e0 y\u00eau c\u1ea7u c\u00e1c nh\u00f3m l\u1ea5y \u00edt nh\u1ea5t hai v\u00ed d\u1ee5 v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt theo g\u1ee3i \u00fd: + HS 1: N\u00eau t\u00ean m\u1ed9t con v\u1eadt b\u1ea5t k\u00ec v\u00e0 \u0111\u1ed1 b\u1ea1n th\u1ee9c \u0103n c\u1ee7a con v\u1eadt \u0111\u00f3. + HS 2: V\u1ebd s\u01a1 \u0111\u1ed3 m\u00f4 t\u1ea3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa ch\u00fang tr\u00ean gi\u1ea5y ho\u1eb7c b\u1ea3ng con. + C\u00e1c HS l\u1ea7n l\u01b0\u1ee3t \u0111\u1ed5i vai tr\u00f2 v\u00e0 n\u00eau t\u00ean nhi\u1ec1u \u0111\u1ed9ng v\u1eadt kh\u00e1c. 161","\u2013 GV quan s\u00e1t qu\u00e1 tr\u00ecnh HS th\u1ea3o lu\u1eadn, th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5. \u2013 GV m\u1eddi 3 \u2013 4 c\u1eb7p HS l\u00ean chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. GV l\u01b0u \u00fd, nh\u1eadn x\u00e9t, ch\u1ec9nh s\u1eeda cho HS c\u00f3 c\u00e1c v\u00ed d\u1ee5 kh\u00f4ng ch\u00ednh x\u00e1c. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 quan s\u00e1t, t\u00ecm hi\u1ec3u m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa 3 \u2013 4 lo\u00e0i sinh v\u1eadt kh\u00e1c nhau \u0111\u1ec3 chu\u1ea9n b\u1ecb cho ti\u1ebft 2. Ti\u1ebft 2 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa hai sinh v\u1eadt, t\u1eeb \u0111\u00f3 d\u1eabn d\u1eaft \u0111\u1ec3 HS t\u00ecm hi\u1ec3u kh\u00e1i ni\u1ec7m v\u1ec1 chu\u1ed7i th\u1ee9c \u0103n. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV g\u1ee3i nh\u1edb cho HS v\u1ec1 v\u00ed d\u1ee5 m\u00f4 t\u1ea3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n \u0111\u00e3 h\u1ecdc \u1edf ti\u1ebft tr\u01b0\u1edbc: C\u00e2y ng\u00f4 \u2192 Chu\u1ed9t. \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi: Con chu\u1ed9t l\u00e0 th\u1ee9c \u0103n c\u1ee7a sinh v\u1eadt n\u00e0o? \u2013 GV m\u1eddi 1 \u2013 2 HS \u0111\u1ee9ng l\u00ean tr\u1ea3 l\u1eddi. \u2013 GV tu\u1ef3 theo c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a HS v\u00e0 l\u1ef1a ch\u1ecdn m\u1ed9t sinh v\u1eadt g\u1ea7n g\u0169i \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn HS vi\u1ebft ti\u1ebfp v\u00e0o s\u01a1 \u0111\u1ed3 C\u00e2y ng\u00f4 \u2192 Chu\u1ed9t. G\u1ee3i \u00fd: C\u00e2y ng\u00f4 \u2192 Chu\u1ed9t \u2192 R\u1eafn ho\u1eb7c C\u00e2y ng\u00f4 \u2192 Chu\u1ed9t \u2192 M\u00e8o. \u2013 GV nh\u1eadn x\u00e9t c\u00e2u tr\u1ea3 l\u1eddi c\u1ee7a HS. Th\u00f4ng qua s\u01a1 \u0111\u1ed3 m\u00f4 t\u1ea3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n, GV d\u1eabn d\u1eaft HS v\u00e0o ti\u1ebft 2. Ho\u1ea1t \u0111\u1ed9ng 1: T\u00ecm hi\u1ec3u chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean * M\u1ee5c ti\u00eau: HS vi\u1ebft \u0111\u01b0\u1ee3c s\u01a1 \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n bi\u1ec3u di\u1ec5n chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS quan s\u00e1t h\u00ecnh 10a, 10b, 10c (SGK, trang 114) v\u1ec1 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa ba lo\u00e0i sinh v\u1eadt: c\u00e0 r\u1ed1t, th\u1ecf, c\u00e1o. GV \u0111\u1eb7t c\u00e2u h\u1ecfi g\u1ee3i \u00fd cho HS: + Th\u1ee9c \u0103n c\u1ee7a th\u1ecf l\u00e0 g\u00ec? + Th\u1ee9c \u0103n c\u1ee7a c\u00e1o l\u00e0 g\u00ec? \u2013 GV y\u00eau c\u1ea7u HS v\u1ebd s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e0 r\u1ed1t v\u00e0 th\u1ecf, gi\u1eefa th\u1ecf v\u00e0 c\u00e1o theo g\u1ee3i \u00fd (SGK, trang 115). G\u1ee3i \u00fd: C\u00e0 r\u1ed1t \u2192 Th\u1ecf \u2192 C\u00e1o. \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi cho HS: Hai s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e0 r\u1ed1t v\u00e0 th\u1ecf, gi\u1eefa th\u1ecf v\u00e0 c\u00e1o c\u00f3 \u0111i\u1ec3m chung l\u00e0 g\u00ec? G\u1ee3i \u00fd: + Th\u1ee9c \u0103n c\u1ee7a th\u1ecf l\u00e0 c\u00e0 r\u1ed1t. + Th\u1ee9c \u0103n c\u1ee7a c\u00e1o l\u00e0 th\u1ecf. 162","+ Gi\u1eefa hai s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n c\u00f3 \u0111i\u1ec3m chung l\u00e0 th\u1ecf. Th\u1ecf v\u1eeba \u0103n c\u00e0 r\u1ed1t, v\u1eeba l\u00e0 th\u1ee9c \u0103n c\u1ee7a c\u00e1o. \u2013 HS quan s\u00e1t h\u00ecnh 10, v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc trong ti\u1ebft 1 \u0111\u1ec3 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi. \u2013 GV v\u00e0 HS c\u00f9ng nh\u1eadn x\u00e9t v\u00e0 r\u00fat ra k\u1ebft lu\u1eadn v\u1ec1 kh\u00e1i ni\u1ec7m chu\u1ed7i th\u1ee9c \u0103n d\u1ef1a v\u00e0o th\u00f4ng tin \u1edf m\u1ee5c Em t\u00ecm hi\u1ec3u th\u00eam. GV l\u01b0u \u00fd cho HS trong b\u00e0i n\u00e0y HS \u0111\u01b0\u1ee3c h\u1ecdc v\u1ec1 chu\u1ed7i th\u1ee9c \u0103n b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt nh\u01b0ng trong th\u1ef1c t\u1ebf c\u00f2n c\u00f3 nh\u1eefng chu\u1ed7i th\u1ee9c \u0103n b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1c m\u00f9n, v\u1ee5n h\u1eefu c\u01a1. C\u00e1c chu\u1ed7i th\u1ee9c \u0103n hi\u1ec7n t\u1ea1i c\u0169ng ch\u01b0a \u0111\u1ec1 c\u1eadp \u0111\u1ebfn sinh v\u1eadt ph\u00e2n hu\u1ef7 (vi khu\u1ea9n, n\u1ea5m). \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi: Chu\u1ed7i th\u1ee9c \u0103n n\u00f3i tr\u00ean c\u00f3 bao nhi\u00eau m\u1eaft x\u00edch? \u2013 HS d\u1ef1a v\u00e0o th\u00f4ng tin \u1edf m\u1ee5c Em t\u00ecm hi\u1ec3u th\u00eam \u0111\u1ec3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi. G\u1ee3i \u00fd: Chu\u1ed7i th\u1ee9c \u0103n n\u00f3i tr\u00ean c\u00f3 ba m\u1eaft x\u00edch. \u2013 GV v\u00e0 HS c\u00f9ng nh\u1eadn x\u00e9t v\u00e0 r\u00fat ra k\u1ebft lu\u1eadn chung v\u1ec1 kh\u00e1i ni\u1ec7m chu\u1ed7i th\u1ee9c \u0103n, m\u1eaft x\u00edch th\u1ee9c \u0103n. * K\u1ebft lu\u1eadn: \u2013 Chu\u1ed7i th\u1ee9c \u0103n g\u1ed3m nhi\u1ec1u sinh v\u1eadt c\u00f3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n v\u1edbi nhau. \u2013 S\u01a1 \u0111\u1ed3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt trong chu\u1ed7i th\u1ee9c \u0103n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u0169i t\u00ean \u0111\u1ec3 bi\u1ec3u di\u1ec5n. M\u1ed7i sinh v\u1eadt trong chu\u1ed7i th\u1ee9c \u0103n g\u1ecdi l\u00e0 m\u1ed9t m\u1eaft x\u00edch th\u1ee9c \u0103n. Ho\u1ea1t \u0111\u1ed9ng 2: S\u1eafp x\u1ebfp c\u00e1c lo\u00e0i sinh v\u1eadt v\u00e0o v\u1ecb tr\u00ed ph\u00f9 h\u1ee3p trong s\u01a1 \u0111\u1ed3 chu\u1ed7i th\u1ee9c \u0103n * M\u1ee5c ti\u00eau: HS ho\u00e0n th\u00e0nh \u0111\u01b0\u1ee3c s\u01a1 \u0111\u1ed3 chu\u1ed7i th\u1ee9c \u0103n v\u1edbi c\u00e1c sinh v\u1eadt \u0111\u00e3 cho tr\u01b0\u1edbc. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t h\u00ecnh 11, 12, 13, 14 (SGK, trang 115) v\u00e0 n\u00eau t\u00ean c\u00e1c lo\u00e0i sinh v\u1eadt c\u00f3 trong h\u00ecnh. \u2013 GV y\u00eau c\u1ea7u HS th\u1ea3o lu\u1eadn nh\u00f3m 4 \u0111\u1ec3 ho\u00e0n th\u00e0nh chu\u1ed7i th\u1ee9c \u0103n. \u2013 Tu\u1ef3 tr\u00ecnh \u0111\u1ed9 HS, GV c\u00f3 th\u1ec3 \u0111\u1eb7t c\u00e2u h\u1ecfi g\u1ee3i \u00fd \u0111\u1ec3 HS ho\u00e0n th\u00e0nh \u0111\u01b0\u1ee3c s\u01a1 \u0111\u1ed3 chu\u1ed7i th\u1ee9c \u0103n v\u1edbi c\u00e1c sinh v\u1eadt \u0111\u00e3 cho tr\u01b0\u1edbc: + M\u1eaft x\u00edch th\u1ee9c \u0103n \u0111\u1ea7u ti\u00ean l\u00e0 sinh v\u1eadt n\u00e0o? + T\u00e9p bi\u1ec3n \u0103n g\u00ec? T\u00e9p bi\u1ec3n c\u00f3 th\u1ec3 \u0103n c\u00e1 tr\u00edch, c\u00e1 ng\u1eeb kh\u00f4ng? + C\u00e1 tr\u00edch \u0103n g\u00ec? + C\u00e1 ng\u1eeb \u0103n g\u00ec? \u2013 GV m\u1eddi 2 \u2013 3 HS l\u00ean b\u1ea3ng vi\u1ebft chu\u1ed7i th\u1ee9c \u0103n. \u2013 GV v\u00e0 HS c\u00f9ng nhau nh\u1eadn x\u00e9t \u0111\u1ec3 r\u00fat ra chu\u1ed7i th\u1ee9c \u0103n \u0111\u00fang. G\u1ee3i \u00fd: T\u1ea3o bi\u1ec3n \u2192 T\u00e9p bi\u1ec3n \u2192 C\u00e1 tr\u00edch \u2192 C\u00e1 ng\u1eeb. Ho\u1ea1t \u0111\u1ed9ng 3: L\u1ea5y v\u00ed d\u1ee5 v\u1ec1 m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean c\u00f3 ba m\u1eaft x\u00edch * M\u1ee5c ti\u00eau: HS c\u00f3 th\u1ec3 n\u00eau \u0111\u01b0\u1ee3c v\u00ed d\u1ee5 v\u1ec1 m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch. 163","* C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS th\u1ea3o lu\u1eadn c\u1eb7p \u0111\u00f4i v\u00e0 chia s\u1ebb v\u1edbi nhau v\u1ec1 c\u00e1c v\u00ed d\u1ee5 v\u1ec1 c\u00e1c chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch. GV c\u00f3 th\u1ec3 y\u00eau c\u1ea7u HS n\u00f3i ho\u1eb7c vi\u1ebft s\u01a1 \u0111\u1ed3 ra gi\u1ea5y, vi\u1ebft tr\u00ean b\u1ea3ng con. \u2013 GV m\u1eddi 2 \u2013 3 c\u1eb7p HS chia s\u1ebb tr\u01b0\u1edbc l\u1edbp. \u2013 GV theo d\u00f5i, \u0111i\u1ec1u khi\u1ec3n qu\u00e1 tr\u00ecnh chia s\u1ebb c\u1ee7a HS. \u2013 HS tr\u1ea3 l\u1eddi v\u00e0 nh\u1eadn x\u00e9t l\u1eabn nhau. \u2013 GV v\u00e0 HS c\u00f9ng nhau nh\u1eadn x\u00e9t, r\u00fat ra k\u1ebft lu\u1eadn c\u00e1c chu\u1ed7i th\u1ee9c \u0103n \u0111\u00fang. Ho\u1ea1t \u0111\u1ed9ng 4: Thi\u1ebft k\u1ebf m\u00f4 h\u00ecnh chu\u1ed7i th\u1ee9c \u0103n * M\u1ee5c ti\u00eau: HS thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh chu\u1ed7i th\u1ee9c \u0103n t\u1eeb c\u00e1c v\u1eadt li\u1ec7u \u0111\u01a1n gi\u1ea3n. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV ph\u00e1t cho HS c\u00e1c v\u1eadt li\u1ec7u \u0111\u00e3 chu\u1ea9n b\u1ecb (SGK, trang 115). GV c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c sinh v\u1eadt trong h\u00ecnh minh ho\u1ea1 ho\u1eb7c GV c\u00f3 th\u1ec3 ch\u1ee7 \u0111\u1ed9ng thi\u1ebft k\u1ebf m\u00f4 h\u00ecnh v\u1edbi c\u00e1c lo\u00e0i sinh v\u1eadt kh\u00e1c. \u2013 GV chu\u1ea9n b\u1ecb th\u1ebb b\u00eca c\u1ee9ng, h\u00ecnh sinh v\u1eadt in s\u1eb5n, sau \u0111\u00f3 y\u00eau c\u1ea7u HS d\u00e1n h\u00ecnh sinh v\u1eadt l\u00ean c\u00e1c th\u1ebb b\u00eca c\u1ee9ng, HS c\u00f3 th\u1ec3 t\u1ef1 v\u1ebd ho\u1eb7c vi\u1ebft t\u00ean c\u00e1c c\u00e1c sinh v\u1eadt l\u00ean c\u00e1c th\u1ebb b\u00eca c\u1ee9ng. \u2013 HS l\u00e0m vi\u1ec7c theo nh\u00f3m 4, th\u1ea3o lu\u1eadn, h\u1ee3p t\u00e1c \u0111\u1ec3 c\u00f9ng ho\u00e0n thi\u1ec7n m\u00f4 h\u00ecnh. \u2013 GV m\u1eddi 2 \u2013 3 nh\u00f3m l\u00ean tr\u00ecnh b\u00e0n s\u1ea3n ph\u1ea9m, c\u00e1c nh\u00f3m c\u00f2n l\u1ea1i c\u00f9ng nh\u1eadn x\u00e9t v\u00e0 \u0111\u01b0a ra k\u1ebft lu\u1eadn v\u1ec1 nh\u00f3m HS l\u00e0m m\u00f4 h\u00ecnh chu\u1ed7i th\u1ee9c \u0103n \u0111\u00fang, \u0111\u1eb9p, nhanh. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 t\u1ef1 thi\u1ebft k\u1ebf m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n g\u1ed3m ba ho\u1eb7c b\u1ed1n m\u1eaft x\u00edch m\u00e0 HS quan s\u00e1t th\u1ea5y \u1edf m\u00f4i tr\u01b0\u1eddng s\u1ed1ng xung quanh. Ti\u1ebft 3 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i l\u1ea1i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 kh\u00e1i ni\u1ec7m chu\u1ed7i th\u1ee9c \u0103n \u0111\u00e3 bi\u1ebft \u1edf ti\u1ebft h\u1ecdc tr\u01b0\u1edbc \u0111\u1ec3 gi\u00fap HS c\u00f3 ki\u1ebfn th\u1ee9c chu\u1ea9n b\u1ecb cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng th\u1ef1c h\u00e0nh, luy\u1ec7n t\u1eadp \u1edf ti\u1ebft 3. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u 2 \u2013 3 HS l\u1ea5y v\u00ed d\u1ee5 v\u1ec1 m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt. \u2013 HS suy ngh\u0129 tr\u1ea3 l\u1eddi. \u2013 GV c\u00f9ng HS nh\u1eadn x\u00e9t c\u00e1c v\u00ed d\u1ee5 \u0111\u01b0\u1ee3c \u0111\u01b0a ra, GV ch\u1ed1t l\u1ea1i \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c, t\u1eeb \u0111\u00f3 GV d\u1eabn d\u1eaft HS v\u00e0o ti\u1ebft 3. Ho\u1ea1t \u0111\u1ed9ng 1: Tr\u00f2 ch\u01a1i: \u201cThi x\u1ebfp chu\u1ed7i th\u1ee9c \u0103n\u201d * M\u1ee5c ti\u00eau: HS l\u1eadp \u0111\u01b0\u1ee3c chu\u1ed7i th\u1ee9c \u0103n d\u1ef1a v\u00e0o m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c sinh v\u1eadt cho tr\u01b0\u1edbc. 164","* C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chu\u1ea9n b\u1ecb s\u1eb5n ho\u1eb7c y\u00eau c\u1ea7u HS t\u1ef1 chu\u1ea9n b\u1ecb c\u00e1c m\u0169 \u0111\u1ed9i c\u00f3 d\u00e1n h\u00ecnh sinh v\u1eadt. GV c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c sinh v\u1eadt (c\u1ecf, ch\u00e2u ch\u1ea5u, \u1ebfch, r\u1eafn) nh\u01b0 g\u1ee3i \u00fd (SGK, trang 115) ho\u1eb7c GV ch\u1ee7 \u0111\u1ed9ng s\u00e1ng t\u1ea1o v\u1edbi c\u00e1c sinh v\u1eadt kh\u00e1c. L\u01b0u \u00fd tr\u00e1nh ch\u1ecdn c\u00e1c v\u00ed d\u1ee5 qu\u00e1 ph\u1ee9c t\u1ea1p, n\u00ean ch\u1ecdn c\u00e1c sinh v\u1eadt g\u1ea7n g\u0169i v\u1edbi \u0111\u1eddi s\u1ed1ng c\u1ee7a HS. \u2013 GV h\u01b0\u1edbng d\u1eabn HS c\u00e1ch ch\u01a1i: M\u1ed7i h\u1ecdc sinh \u0111\u00f3ng vai l\u00e0 m\u1ed9t m\u1eaft x\u00edch. C\u00e1c \u0111\u1ed9i ch\u01a1i x\u1ebfp th\u00e0nh h\u00e0ng d\u1ecdc, ng\u01b0\u1eddi \u0111\u1ee9ng sau \u0111\u1eb7t tay l\u00ean hai vai c\u1ee7a ng\u01b0\u1eddi \u0111\u1ee9ng tr\u01b0\u1edbc \u0111\u1ec3 l\u1eadp th\u00e0nh chu\u1ed7i th\u1ee9c \u0103n. Khi GV h\u00f4 kh\u1ea9u l\u1ec7nh \u201cH\u00e3y l\u1eadp chu\u1ed7i th\u1ee9c \u0103n v\u1edbi N m\u1eaft x\u00edch\u201d (N l\u00e0 s\u1ed1 m\u1eaft x\u00edch trong chu\u1ed7i th\u1ee9c \u0103n, c\u00f3 th\u1ec3 l\u00e0 ba ho\u1eb7c b\u1ed1n m\u1eaft x\u00edch) th\u00ec HS ph\u1ea3i nhanh ch\u00f3ng x\u1ebfp h\u00e0ng d\u1ecdc nh\u01b0 h\u01b0\u1edbng d\u1eabn \u0111\u1ec3 l\u1eadp th\u00e0nh chu\u1ed7i th\u1ee9c \u0103n \u0111\u00fang. Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u h\u00f4 kh\u1ea9u l\u1ec7nh y\u00eau c\u1ea7u l\u1eadp chu\u1ed7i th\u1ee9c \u0103n, GV n\u00ean c\u00f3 d\u1ef1 l\u1ec7nh: \u201cC\u00e1c nh\u00f3m chu\u1ea9n b\u1ecb!\u201d \u0111\u1ec3 HS ch\u00fa \u00fd v\u00e0 t\u1eadp trung \u0111\u1ec3 b\u1eaft \u0111\u1ea7u tri\u1ec3n khai ho\u1ea1t \u0111\u1ed9ng. \u2013 HS l\u1eadp c\u00e1c \u0111\u1ed9i ch\u01a1i g\u1ed3m 4 \u2013 5 ng\u01b0\u1eddi tu\u1ef3 theo s\u1ed1 l\u01b0\u1ee3ng m\u1eaft x\u00edch th\u1ee9c \u0103n m\u00e0 GV \u0111\u00e3 chu\u1ea9n b\u1ecb m\u0169 \u0111\u1ed9i. \u2013 GV \u0111\u00f3ng vai tr\u00f2 l\u00e0 qu\u1ea3n tr\u00f2 \u0111i\u1ec1u khi\u1ec3n hai \u0111\u1ed9i ch\u01a1i, m\u1ed7i l\u01b0\u1ee3t ch\u01a1i g\u1ed3m hai \u0111\u1ed9i c\u00f9ng th\u1ef1c hi\u1ec7n. Tu\u1ef3 v\u00e0o th\u1eddi gian v\u00e0 \u0111\u1ed9 nhanh ch\u1eadm c\u1ee7a HS m\u00e0 GV quy\u1ebft \u0111\u1ecbnh bao nhi\u00eau c\u1eb7p ch\u01a1i. C\u00e1c \u0111\u1ed9i ch\u01a1i c\u00f3 th\u1ec3 d\u00f9ng m\u0169 d\u00e1n sinh v\u1eadt gi\u1ed1ng nhau trong c\u00f9ng m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n cho tr\u01b0\u1edbc ho\u1eb7c GV c\u00f3 th\u1ec3 chu\u1ea9n b\u1ecb th\u00eam m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n kh\u00e1c \u0111\u1ec3 tr\u00f2 ch\u01a1i phong ph\u00fa h\u01a1n. \u2013 GV l\u1ea7n l\u01b0\u1ee3t h\u00f4 l\u1ec7nh l\u1eadp chu\u1ed7i th\u1ee9c \u0103n v\u1edbi s\u1ed1 l\u01b0\u1ee3ng m\u1eaft x\u00edch l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng ba. \u2013 Khi c\u00e1c \u0111\u1ed9i ch\u01a1i \u0111\u00e3 x\u1ebfp \u0111\u01b0\u1ee3c m\u1ed9t h\u00e0ng chu\u1ed7i th\u1ee9c \u0103n, GV y\u00eau c\u1ea7u c\u00e1c HS d\u01b0\u1edbi l\u1edbp quan s\u00e1t v\u00e0 nh\u1eadn x\u00e9t v\u1ec1 chu\u1ed7i th\u1ee9c \u0103n \u0111\u00f3. GV c\u00f3 th\u1ec3 y\u00eau c\u1ea7u HS d\u01b0\u1edbi l\u1edbp gi\u1ea3i th\u00edch v\u00ec sao chu\u1ed7i th\u1ee9c \u0103n sai (n\u1ebfu c\u00f3) v\u00e0 \u0111\u01b0a ra ph\u01b0\u01a1ng \u00e1n ch\u1ec9nh s\u1eeda cho ph\u00f9 h\u1ee3p. \u2013 C\u00e1c nh\u00f3m HS l\u1eafng nghe l\u1ec7nh c\u1ee7a qu\u1ea3n tr\u00f2, ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch nhanh m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c sinh v\u1eadt \u0111\u1ec3 x\u1ebfp th\u1eadt nhanh th\u00e0nh h\u00e0ng d\u1ecdc bi\u1ec3u di\u1ec5n cho chu\u1ed7i th\u1ee9c \u0103n. \u2013 GV tuy\u00ean d\u01b0\u01a1ng c\u00e1c \u0111\u1ed9i ch\u01a1i th\u1ef1c hi\u1ec7n nhanh, l\u1eadp \u0111\u01b0\u1ee3c chu\u1ed7i th\u1ee9c \u0103n ch\u00ednh x\u00e1c. Ho\u1ea1t \u0111\u1ed9ng 2: Th\u1ef1c h\u00e0nh quan s\u00e1t v\u00e0 l\u1eadp chu\u1ed7i th\u1ee9c \u0103n \u1edf m\u00f4i tr\u01b0\u1eddng n\u01a1i em s\u1ed1ng * M\u1ee5c ti\u00eau: HS l\u1eadp \u0111\u01b0\u1ee3c chu\u1ed7i th\u1ee9c \u0103n d\u1ef1a v\u00e0o m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c sinh v\u1eadt c\u00f3 trong m\u00f4i tr\u01b0\u1eddng n\u01a1i HS s\u1ed1ng (nh\u00e0, c\u00f4ng vi\u00ean, v\u01b0\u1eddn tr\u01b0\u1eddng, khu sinh th\u00e1i,\u2026). * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS chu\u1ea9n b\u1ecb v\u1edf, b\u00fat, phi\u1ebfu h\u1ecdc t\u1eadp (SGK, trang 116), m\u0169 \u0111\u1ec3 chu\u1ea9n b\u1ecb quan s\u00e1t ngo\u00e0i s\u00e2n tr\u01b0\u1eddng ho\u1eb7c t\u1ea1i m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m sinh th\u00e1i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn (n\u1ebfu c\u00f3 \u0111i\u1ec1u ki\u1ec7n v\u1ec1 th\u1eddi gian v\u00e0 thu\u1eadn l\u1ee3i trong vi\u1ec7c di chuy\u1ec3n). \u2013 GV ph\u00e2n c\u00f4ng HS l\u00e0m vi\u1ec7c theo nh\u00f3m 4 ho\u1eb7c nh\u00f3m 5, th\u1ef1c hi\u1ec7n quan s\u00e1t m\u00f4i tr\u01b0\u1eddng n\u01a1i HS s\u1ed1ng (nh\u00e0, c\u00f4ng vi\u00ean, v\u01b0\u1eddn tr\u01b0\u1eddng, khu sinh th\u00e1i,\u2026) v\u00e0 ho\u00e0n th\u00e0nh phi\u1ebfu h\u1ecdc t\u1eadp. \u2013 Trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n, GV quan s\u00e1t, qu\u1ea3n l\u00ed v\u00e0 g\u1ee3i \u00fd, h\u01b0\u1edbng d\u1eabn cho c\u00e1c nh\u00f3m \u0111\u1ec3 HS th\u1ef1c hi\u1ec7n \u0111\u00fang n\u1ed9i dung phi\u1ebfu h\u1ecdc t\u1eadp. GV gi\u1ea3i \u0111\u00e1p nh\u1eefng b\u0103n kho\u0103n, th\u1eafc m\u1eafc c\u1ee7a HS khi ph\u00e2n t\u00edch m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt t\u1ea1i \u0111i\u1ec3m th\u1ef1c h\u00e0nh \u0111\u1ec3 thi\u1ebft l\u1eadp chu\u1ed7i th\u1ee9c \u0103n \u0111\u00fang, ph\u00f9 h\u1ee3p. 165","\u2013 HS nghi\u00eam t\u00fac v\u00e0 t\u00edch c\u1ef1c th\u1ef1c hi\u1ec7n quan s\u00e1t, ghi ch\u00e9p, ph\u00e2n t\u00edch. \u2013 GV t\u1ed5 ch\u1ee9c cho HS chia s\u1ebb s\u1ea3n ph\u1ea9m phi\u1ebfu h\u1ecdc t\u1eadp v\u1edbi c\u00e1c b\u1ea1n trong l\u1edbp. GV c\u00f9ng HS nh\u1eadn x\u00e9t v\u00e0 ch\u1ec9nh s\u1eeda c\u00e1c l\u1ed7i ch\u01b0a ch\u00ednh x\u00e1c trong ph\u1ea7n chia s\u1ebb c\u1ee7a c\u00e1c nh\u00f3m. * K\u1ebft lu\u1eadn: Trong t\u1ef1 nhi\u00ean c\u00f3 nhi\u1ec1u chu\u1ed7i th\u1ee9c \u0103n, ph\u1ea7n l\u1edbn c\u00e1c chu\u1ed7i th\u1ee9c \u0103n b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt. M\u1ed7i chu\u1ed7i th\u1ee9c \u0103n c\u00f3 nhi\u1ec1u m\u1eaft x\u00edch. M\u1ed7i m\u1eaft x\u00edch \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. \u2013 GV y\u00eau c\u1ea7u HS \u0111\u1ecdc n\u1ed9i dung ch\u1ed1t ki\u1ebfn th\u1ee9c c\u1ee7a b\u00e0i h\u1ecdc \u1edf m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c. \u2013 GV g\u1ee3i \u00fd v\u00e0 d\u1eabn d\u1eaft \u0111\u1ec3 HS n\u00eau \u0111\u01b0\u1ee3c c\u00e1c t\u1eeb kho\u00e1 trong b\u00e0i: Sinh v\u1eadt \u2013 M\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n \u2013 M\u1eaft x\u00edch \u2013 Chu\u1ed7i th\u1ee9c \u0103n. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 vi\u1ebft hai chu\u1ed7i th\u1ee9c \u0103n c\u00f3 t\u1eeb ba m\u1eaft x\u00edch tr\u1edf l\u00ean, b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt m\u00e0 HS quan s\u00e1t th\u1ea5y \u1edf m\u00f4i tr\u01b0\u1eddng s\u1ed1ng xung quanh n\u01a1i \u1edf \u0111\u1ec3 c\u1ee7ng c\u1ed1 th\u00eam ki\u1ebfn th\u1ee9c. GV y\u00eau c\u1ea7u HS ghi nh\u1edb ki\u1ebfn th\u1ee9c c\u1ee7a b\u00e0i h\u1ecdc \u1edf m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c. B\u00e0i 31. VAI TR\u00d2 C\u1ee6A TH\u1ef0C V\u1eacT TRONG CHU\u1ed6I TH\u1ee8C \u0102N (3 ti\u1ebft) I. Y\u00eau c\u1ea7u c\u1ea7n \u0111\u1ea1t Sau b\u00e0i h\u1ecdc, HS: \u2212 Tr\u00ecnh b\u00e0y \u0111\u01b0\u1ee3c vai tr\u00f2 quan tr\u1ecdng c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho con ng\u01b0\u1eddi v\u00e0 \u0111\u1ed9ng v\u1eadt. \u2212 Th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 vi\u1ec7c l\u00e0m gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean v\u00e0 v\u1eadn \u0111\u1ed9ng gia \u0111\u00ecnh c\u00f9ng th\u1ef1c hi\u1ec7n. II. \u0110\u1ed3 d\u00f9ng d\u1ea1y h\u1ecdc \u2013 GV: C\u00e1c h\u00ecnh trong b\u00e0i 31 SGK; c\u00e1c h\u00ecnh \u1ea3nh s\u01b0u t\u1ea7m th\u00eam. \u2013 HS: SGK, VBT. III. C\u00c1C Ho\u1ea1t \u0111\u1ed9ng d\u1ea1y h\u1ecdc Ti\u1ebft 1 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt trong chu\u1ed7i th\u1ee9c \u0103n. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t hai v\u00ed d\u1ee5 v\u1ec1 chu\u1ed7i th\u1ee9c \u0103n v\u00e0 cho bi\u1ebft c\u00e1c chu\u1ed7i th\u1ee9c \u0103n n\u00e0y b\u1eaft \u0111\u1ea7u b\u1eb1ng sinh v\u1eadt n\u00e0o. \u2013 GV m\u1eddi 1 \u2013 2 HS tr\u1ea3 l\u1eddi. 166","G\u1ee3i \u00fd: Hai chu\u1ed7i th\u1ee9c \u0103n trong h\u00ecnh 1 v\u00e0 2 \u0111\u1ec1u b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt (c\u1ecf). \u2013 GV h\u1ecfi HS: \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu nh\u01b0 kh\u00f4ng c\u00f2n c\u1ecf? \u2013 GV m\u1eddi HS b\u1ea5t k\u00ec n\u00eau \u00fd ki\u1ebfn, GV kh\u00f4ng k\u1ebft lu\u1eadn \u0111\u00fang \u2013 sai. \u2013 GV nh\u1eadn x\u00e9t chung v\u00e0 d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc: \u201cVai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt trong chu\u1ed7i th\u1ee9c \u0103n\u201d. Ho\u1ea1t \u0111\u1ed9ng 1: Vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho con ng\u01b0\u1eddi * M\u1ee5c ti\u00eau: HS tr\u00ecnh b\u00e0y \u0111\u01b0\u1ee3c vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho con ng\u01b0\u1eddi. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS l\u00e0m vi\u1ec7c nh\u00f3m \u0111\u00f4i, quan s\u00e1t h\u00ecnh 3a, 3b, 3c, 3d, 3e, 3g (SGK, trang 117) v\u00e0 y\u00eau c\u1ea7u HS tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi: + Con ng\u01b0\u1eddi s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 ph\u1eadn n\u00e0o c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ec3 l\u00e0m th\u1ee9c \u0103n? + Ngo\u00e0i vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n, th\u1ef1c v\u1eadt c\u00f2n c\u00f3 vai tr\u00f2 g\u00ec \u0111\u1ed1i v\u1edbi con ng\u01b0\u1eddi? \u2013 GV m\u1eddi HS tr\u1ea3 l\u1eddi v\u00e0 cho HS nh\u1eadn x\u00e9t l\u1eabn nhau. G\u1ee3i \u00fd: + H\u00ecnh 3a: D\u00f9ng h\u1ea1t l\u00faa l\u00e0m ra g\u1ea1o \u0111\u1ec3 n\u1ea5u c\u01a1m; H\u00ecnh 3b: D\u00f9ng qu\u1ea3 cam \u0111\u1ec3 \u00e9p n\u01b0\u1edbc u\u1ed1ng; H\u00ecnh 3c: D\u00f9ng qu\u1ea3 nho \u0111\u1ec3 l\u00e0m m\u00f3n \u0103n; H\u00ecnh 3d: D\u00f9ng c\u1ee7 c\u00e0 r\u1ed1t \u0111\u1ec3 n\u1ea5u s\u00fap; H\u00ecnh 3e: D\u00f9ng th\u00e2n v\u00e0 l\u00e1 rau mu\u1ed1ng \u0111\u1ec3 l\u00e0m m\u00f3n \u0103n; H\u00ecnh 3g: D\u00f9ng h\u1ea1t sen \u0111\u1ec3 n\u1ea5u ch\u00e8. + Ngo\u00e0i vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n, th\u1ef1c v\u1eadt c\u00f2n c\u00f3 vai tr\u00f2 l\u00e0m trong l\u00e0nh kh\u00f4ng kh\u00ed; cung c\u1ea5p nguy\u00ean v\u1eadt li\u1ec7u g\u1ed7 cho x\u00e2y d\u1ef1ng, l\u00e0m \u0111\u1ed3 d\u00f9ng (b\u00e0n, gh\u1ebf, t\u1ee7, gi\u01b0\u1eddng,\u2026); l\u00e0m c\u00e2y c\u1ea3nh; ng\u0103n ch\u1eb7n s\u1ea1t l\u1ee1 \u0111\u1ea5t; ch\u1eafn gi\u00f3,\u2026 * K\u1ebft lu\u1eadn: Th\u1ef1c v\u1eadt c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho con ng\u01b0\u1eddi. Ho\u1ea1t \u0111\u1ed9ng 2: Vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho \u0111\u1ed9ng v\u1eadt * M\u1ee5c ti\u00eau: HS tr\u00ecnh b\u00e0y \u0111\u01b0\u1ee3c vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho \u0111\u1ed9ng v\u1eadt. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS l\u00e0m vi\u1ec7c nh\u00f3m \u0111\u00f4i, quan s\u00e1t h\u00ecnh 4a \u2013 4m (SGK, trang 118) v\u00e0 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi: + C\u00e1c chu\u1ed7i th\u1ee9c \u0103n b\u1eaft \u0111\u1ea7u t\u1eeb sinh v\u1eadt n\u00e0o? + N\u1ebfu kh\u00f4ng c\u00f3 th\u1ef1c v\u1eadt, c\u00e1c sinh v\u1eadt kh\u00e1c trong nh\u1eefng chu\u1ed7i th\u1ee9c \u0103n n\u00e0y c\u00f3 t\u1ed3n t\u1ea1i kh\u00f4ng? V\u00ec sao? G\u1ee3i \u00fd: + C\u00e1c chu\u1ed7i th\u1ee9c \u0103n b\u1eaft \u0111\u1ea7u t\u1eeb th\u1ef1c v\u1eadt: chu\u1ed7i th\u1ee9c \u0103n 1 (h\u00ecnh 4a: c\u1ecf); chu\u1ed7i th\u1ee9c \u0103n 2 (h\u00ecnh 4e: l\u00faa); chu\u1ed7i th\u1ee9c \u0103n 3 (h\u00ecnh 4i: rong). + N\u1ebfu kh\u00f4ng c\u00f3 th\u1ef1c v\u1eadt, c\u00e1c sinh v\u1eadt kh\u00e1c trong c\u00e1c chu\u1ed7i th\u1ee9c \u0103n kh\u00f4ng t\u1ed3n t\u1ea1i \u0111\u01b0\u1ee3c v\u00ec c\u00e1c sinh v\u1eadt \u0103n th\u1ef1c v\u1eadt (nh\u01b0 th\u1ecf, g\u00e0, \u0111\u1ed9ng v\u1eadt ph\u00f9 du) kh\u00f4ng c\u00f3 th\u1ee9c \u0103n n\u00ean kh\u00f4ng s\u1ed1ng \u0111\u01b0\u1ee3c, d\u1eabn \u0111\u1ebfn c\u00e1c sinh v\u1eadt kh\u00e1c n\u1eb1m ph\u00eda sau c\u1ee7a chu\u1ed7i th\u1ee9c \u0103n c\u0169ng kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i. 167","* K\u1ebft lu\u1eadn: Th\u1ef1c v\u1eadt c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho \u0111\u1ed9ng v\u1eadt, l\u00e0 sinh v\u1eadt \u0111\u1ea7u ti\u00ean trong c\u00e1c chu\u1ed7i th\u1ee9c \u0103n. Ho\u1ea1t \u0111\u1ed9ng 3: Th\u1ea3o lu\u1eadn * M\u1ee5c ti\u00eau: HS tr\u00ecnh b\u00e0y \u0111\u01b0\u1ee3c vai tr\u00f2 r\u1ea5t quan tr\u1ecdng c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi c\u00e1c lo\u00e0i sinh v\u1eadt tr\u00ean Tr\u00e1i \u0110\u1ea5t. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS th\u1ea3o lu\u1eadn nh\u00f3m \u0111\u00f4i v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: H\u00e3y th\u1eed t\u01b0\u1edfng t\u01b0\u1ee3ng \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu kh\u00f4ng c\u00f3 th\u1ef1c v\u1eadt tr\u00ean Tr\u00e1i \u0110\u1ea5t. \u2013 HS th\u1ea3o lu\u1eadn nh\u00f3m v\u00e0 tr\u1ea3 l\u1eddi t\u1ef1 do d\u1ef1a tr\u00ean hi\u1ec3u bi\u1ebft c\u1ee7a HS. \u2013 GV t\u1ed5 ch\u1ee9c cho HS th\u1ea3o lu\u1eadn, ghi nh\u1eadn nh\u1eefng \u00fd ch\u00ednh x\u00e1c tr\u00ean b\u1ea3ng. Trong c\u00e1c n\u1ed9i dung HS tr\u1ea3 l\u1eddi, GV c\u1ea7n nh\u1ea5n m\u1ea1nh cho HS: Khi kh\u00f4ng c\u00f3 th\u1ef1c v\u1eadt tr\u00ean Tr\u00e1i \u0110\u1ea5t th\u00ec c\u00e1c sinh v\u1eadt kh\u00e1c s\u1ebd kh\u00f4ng t\u1ed3n t\u1ea1i \u0111\u01b0\u1ee3c v\u00ec th\u1ef1c v\u1eadt l\u00e0 m\u1eaft x\u00edch \u0111\u1ea7u ti\u00ean trong c\u00e1c chu\u1ed7i th\u1ee9c \u0103n. G\u1ee3i \u00fd: Khi kh\u00f4ng c\u00f3 th\u1ef1c v\u1eadt tr\u00ean Tr\u00e1i \u0110\u1ea5t th\u00ec: + C\u00e1c sinh v\u1eadt \u0103n th\u1ef1c v\u1eadt s\u1ebd kh\u00f4ng t\u1ed3n t\u1ea1i v\u00ec kh\u00f4ng c\u00f3 th\u1ee9c \u0103n. + B\u1ea7u kh\u00f4ng kh\u00ed \u00edt trong l\u00e0nh h\u01a1n v\u00ec thi\u1ebfu kh\u00ed \u00f4-xi t\u1eeb th\u1ef1c v\u1eadt th\u1ea3i ra m\u00f4i tr\u01b0\u1eddng qua qu\u00e1 tr\u00ecnh quang h\u1ee3p. + Con ng\u01b0\u1eddi kh\u00f4ng c\u00f3 v\u1eadt li\u1ec7u g\u1ed7 \u0111\u1ec3 x\u00e2y d\u1ef1ng, l\u00e0m \u0111\u1ed3 d\u00f9ng trong nh\u00e0,... + M\u1eb7t \u0111\u1ea5t d\u1ec5 b\u1ecb x\u00f3i m\u00f2n do kh\u00f4ng c\u00f2n c\u00e2y xanh che ph\u1ee7,\u2026 * K\u1ebft lu\u1eadn: Nh\u1edd kh\u1ea3 n\u0103ng t\u1ef1 t\u1ed5ng h\u1ee3p ch\u1ea5t dinh d\u01b0\u1ee1ng t\u1eeb n\u01b0\u1edbc v\u00e0 kh\u00ed c\u00e1c-b\u00f4-n\u00edc d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi n\u00ean th\u1ef1c v\u1eadt c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n cho ng\u01b0\u1eddi v\u00e0 \u0111\u1ed9ng v\u1eadt. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc \u2013 GV y\u00eau c\u1ea7u HS ghi nh\u1edb ki\u1ebfn th\u1ee9c trong m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c. \u2013 GV y\u00eau c\u1ea7u HS t\u00ecm hi\u1ec3u v\u00e0 n\u00eau th\u00eam nh\u1eefng v\u00ed d\u1ee5 v\u1ec1 vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi \u0111\u1eddi s\u1ed1ng c\u1ee7a con ng\u01b0\u1eddi v\u00e0 \u0111\u1ed9ng v\u1eadt. Ti\u1ebft 2 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi con ng\u01b0\u1eddi v\u00e0 \u0111\u1ed9ng v\u1eadt trong vi\u1ec7c cung c\u1ea5p th\u1ee9c \u0103n. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u 2 \u2013 3 HS l\u00ean b\u1ea3ng vi\u1ebft v\u00ed d\u1ee5 nh\u1eefng chu\u1ed7i th\u1ee9c \u0103n g\u1ed3m ba \u0111\u1ebfn b\u1ed1n m\u1eaft x\u00edch b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt. \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi cho HS: \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi con ng\u01b0\u1eddi g\u00e2y h\u1ea1i \u0111\u1ebfn th\u1ef1c v\u1eadt l\u00e0 m\u1eaft x\u00edch \u0111\u1ea7u ti\u00ean trong c\u00e1c chu\u1ed7i th\u1ee9c \u0103n? 168","Ho\u1ea1t \u0111\u1ed9ng 1: T\u00ecm hi\u1ec3u kh\u00e1i ni\u1ec7m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n * M\u1ee5c ti\u00eau: HS hi\u1ec3u \u0111\u01b0\u1ee3c kh\u00e1i ni\u1ec7m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chia l\u1edbp th\u00e0nh c\u00e1c nh\u00f3m 4, y\u00eau c\u1ea7u HS quan s\u00e1t h\u00ecnh 5 v\u00e0 6 (SGK, trang 119) v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng c\u00e1c sinh v\u1eadt trong ru\u1ed9ng l\u00faa tr\u01b0\u1edbc v\u00e0 sau khi phun thu\u1ed1c tr\u1eeb s\u00e2u sinh ho\u0323c. GV h\u01b0\u1edbng d\u1eabn HS \u0111\u1ecdc th\u00f4ng tin \u1edf m\u1ee5c Em t\u00ecm hi\u1ec3u th\u00eam (SGK, trang 119) v\u00e0 ho\u00e0n th\u00e0nh phi\u1ebfu quan s\u00e1t theo g\u1ee3i \u00fd m\u1eabu. \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi cho HS: + Khi s\u1ed1 l\u01b0\u1ee3ng bo\u0323 x\u00edt b\u1ecb gi\u1ea3m s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ngu\u1ed3n th\u1ee9c \u0103n c\u1ee7a \u1ebfch nh\u01b0 th\u1ebf n\u00e0o? Sau m\u1ed9t th\u1eddi gian thi\u1ebfu bo\u0323 x\u00edt, \u1ebfch c\u00f3 b\u1ecb gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng kh\u00f4ng? V\u00ec sao? + Gi\u1ea3i th\u00edch v\u00ec sao s\u1ed1 l\u01b0\u1ee3ng c\u00f4n tr\u00f9ng gi\u1ea3m \u0111\u1ed9t ng\u1ed9t \u0111\u00e3 l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong ru\u1ed9ng l\u00faa. G\u1ee3i \u00fd: PHI\u1ebeU QUAN S\u00c1T Sinh v\u1eadt trong chu\u1ed7i th\u1ee9c \u0103n Tr\u01b0\u1edbc khi phun thu\u1ed1c tr\u1eeb s\u00e2u Sau khi phun thu\u1ed1c tr\u1eeb s\u00e2u L\u00faa Kh\u00f4ng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng Kh\u00f4ng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng B\u1ecd x\u00edt Kh\u00f4ng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng Gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng \u1ebech Kh\u00f4ng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng Kh\u00f4ng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng + Khi s\u1ed1 l\u01b0\u1ee3ng bo\u0323 x\u00edt b\u1ecb gi\u1ea3m, ngu\u1ed3n th\u1ee9c \u0103n c\u1ee7a \u1ebfch b\u1ecb h\u1ea1n ch\u1ebf. Sau m\u1ed9t th\u1eddi gian thi\u1ebfu bo\u0323 x\u00edt, \u1ebfch s\u1ebd b\u1ecb gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng. V\u00ec thi\u1ebfu th\u1ee9c \u0103n, \u1ebfch kh\u00f4ng s\u1ed1ng v\u00e0 ph\u00e1t tri\u1ec3n b\u00ecnh th\u01b0\u1eddng \u0111\u01b0\u1ee3c. + S\u1ed1 l\u01b0\u1ee3ng c\u00f4n tr\u00f9ng gi\u1ea3m \u0111\u1ed9t ng\u1ed9t \u0111\u00e3 l\u00e0m th\u1ee9c \u0103n c\u1ee7a \u1ebfch b\u1ecb thi\u1ebfu nhanh ch\u00f3ng d\u1eabn \u0111\u1ebfn m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong ru\u1ed9ng l\u00faa. * K\u1ebft lu\u1eadn: Trong t\u1ef1 nhi\u00ean, s\u1ed1 l\u01b0\u1ee3ng sinh v\u1eadt c\u1ee7a m\u1ed7i m\u1eaft x\u00edch trong chu\u1ed7i th\u1ee9c \u0103n lu\u00f4n \u1ed5n \u0111\u1ecbnh \u1edf m\u1ed9t m\u1ee9c nh\u1ea5t \u0111\u1ecbnh t\u1ea1o n\u00ean s\u1ef1 c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. Ho\u1ea1t \u0111\u1ed9ng 2: Th\u1ea3o lu\u1eadn * M\u1ee5c ti\u00eau: HS v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc \u0111\u1ec3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi c\u00f3 li\u00ean quan \u0111\u1ebfn kh\u00e1i ni\u1ec7m c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS th\u1ea3o lu\u1eadn nh\u00f3m \u0111\u00f4i v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: Khi r\u1eebng b\u1ecb ch\u00e1y ho\u1eb7c b\u1ecb ch\u1eb7t ph\u00e1, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y xanh gi\u1ea3m m\u1ea1nh. \u0110i\u1ec1u n\u00e0y c\u00f3 \u1ea3nh h\u01b0\u1edfng g\u00ec \u0111\u1ebfn c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt s\u1ed1ng trong r\u1eebng? Gi\u1ea3i th\u00edch. \u2013 HS th\u1ea3o lu\u1eadn nh\u00f3m \u0111\u00f4i v\u00e0 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi. \u2013 GV m\u1eddi 3 \u2013 4 HS b\u1ea5t k\u00ec n\u00eau \u00fd ki\u1ebfn. \u2013 GV h\u01b0\u1edbng d\u1eabn HS k\u1ebft lu\u1eadn. 169","G\u1ee3i \u00fd: Khi r\u1eebng b\u1ecb ch\u00e1y ho\u1eb7c b\u1ecb ch\u1eb7t ph\u00e1, s\u1ed1 l\u01b0\u1ee3ng c\u00e2y xanh gi\u1ea3m m\u1ea1nh. \u0110i\u1ec1u n\u00e0y c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt s\u1ed1ng trong r\u1eebng v\u00ec c\u00e2y xanh l\u00e0 ngu\u1ed3n th\u1ee9c \u0103n c\u1ee7a \u0111\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt, khi m\u1ea5t ngu\u1ed3n th\u1ee9c \u0103n nhanh ch\u00f3ng, \u0111\u1ed9t ng\u1ed9t s\u1ebd l\u00e0m gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0111\u00f3, g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt kh\u00e1c trong chu\u1ed7i th\u1ee9c \u0103n. Ngo\u00e0i ra, m\u1ea5t c\u00e2y xanh s\u1ebd l\u00e0m cho nhi\u1ec1u lo\u00e0i \u0111\u1ed9ng v\u1eadt b\u1ecb m\u1ea5t n\u01a1i \u1edf, n\u01a1i \u1ea9n n\u00e1u. B\u1ea7u kh\u00f4ng kh\u00ed c\u1ee7a r\u1eebng b\u1ecb \u00f4 nhi\u1ec5m v\u00ec kh\u00f3i, b\u1ee5i, thi\u1ebfu h\u1ee5t kh\u00ed \u00f4-xi nh\u1edd quang h\u1ee3p. \u2013 GV c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng th\u00eam c\u00e1c \u00fd li\u00ean quan \u0111\u1ebfn s\u1ef1 x\u00f3i m\u00f2n \u0111\u1ea5t khi c\u00f3 m\u01b0a l\u1edbn, g\u00e2y l\u0169 qu\u00e9t, s\u1ea1t l\u1ee1,\u2026 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111i\u1ec1u ki\u1ec7n s\u1ed1ng c\u1ee7a c\u00e1c lo\u00e0i sinh v\u1eadt trong r\u1eebng. Ho\u1ea1t \u0111\u1ed9ng 3: T\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c vi\u1ec7c c\u1ea7n l\u00e0m \u0111\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n * M\u1ee5c ti\u00eau: HS nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c nh\u1eefng vi\u1ec7c c\u1ea7n l\u00e0m \u0111\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV \u0111\u1ec1 ngh\u1ecb HS l\u00e0m vi\u1ec7c theo nh\u00f3m \u0111\u00f4i, quan s\u00e1t c\u00e1c h\u00ecnh 7, 8, 9,10 (SGK, trang 120) v\u00e0 cho bi\u1ebft vi\u1ec7c l\u00e0m n\u00e0o c\u00f3 th\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n, vi\u1ec7c l\u00e0m n\u00e0o c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. Gi\u1ea3i th\u00edch. G\u1ee3i \u00fd: + H\u00ecnh 7: Tr\u1ed3ng th\u00eam c\u00e2y xanh l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. Gi\u1ea3i th\u00edch: Vi\u1ec7c tr\u1ed3ng th\u00eam c\u00e2y xanh s\u1ebd gi\u00fap ph\u00e1t tri\u1ec3n s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt l\u00e0 m\u1eaft x\u00edch \u0111\u1ea7u ti\u00ean trong nh\u1eefng chu\u1ed7i th\u1ee9c \u0103n ngo\u00e0i t\u1ef1 nhi\u00ean, \u0111\u1ea3m b\u1ea3o ngu\u1ed3n th\u1ee9c \u0103n cho c\u00e1c lo\u00e0i sinh v\u1eadt \u0103n th\u1ef1c v\u1eadt v\u00e0 gi\u00e1n ti\u1ebfp gi\u00fap \u1ed5n \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i sinh v\u1eadt kh\u00e1c trong chu\u1ed7i th\u1ee9c \u0103n. + H\u00ecnh 8: Ch\u1eb7t c\u00e2y r\u1eebng, \u0111\u1ed1t n\u01b0\u01a1ng l\u00e0m r\u1eaby l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. Gi\u1ea3i th\u00edch: Ch\u1eb7t c\u00e2y, \u0111\u1ed1t n\u01b0\u01a1ng l\u00e0m r\u1eaby d\u1eabn \u0111\u1ebfn gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng th\u1ef1c v\u1eadt \u0111\u1ed9t ng\u1ed9t, l\u00e0m m\u1ea5t ngu\u1ed3n th\u1ee9c \u0103n c\u1ee7a nhi\u1ec1u lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt, l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i sinh v\u1eadt n\u00e0y, gi\u00e1n ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c lo\u00e0i sinh v\u1eadt kh\u00e1c trong chu\u1ed7i th\u1ee9c \u0103n \u1edf r\u1eebng. \u0110\u1ed9ng v\u1eadt m\u1ea5t ch\u1ed7 \u1edf, ch\u1ed7 \u1ea9n n\u00e1u khi c\u00e2y xanh b\u1ecb m\u1ea5t \u0111i s\u1ebd c\u00f3 th\u1ec3 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9ng v\u1eadt do ch\u00fang d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng b\u1edfi c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0103n \u0111\u1ed9ng v\u1eadt kh\u00e1c. + H\u00ecnh 9: Phun thu\u1ed1c tr\u1eeb s\u00e2u l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. Gi\u1ea3i th\u00edch: Phun thu\u1ed1c tr\u1eeb s\u00e2u s\u1ebd l\u00e0m gi\u1ea3m \u0111\u1ed9t ng\u1ed9t s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i c\u00f4n tr\u00f9ng, d\u1eabn t\u1edbi thi\u1ebfu th\u1ee9c \u0103n \u0111\u1ed9t ng\u1ed9t cho c\u00e1c lo\u00e0i sinh v\u1eadt \u0103n c\u00f4n tr\u00f9ng, t\u1eeb \u0111\u00f3 l\u00e0m suy gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt kh\u00e1c c\u00f3 li\u00ean quan trong chu\u1ed7i th\u1ee9c \u0103n \u1edf ru\u1ed9ng l\u00faa. + H\u00ecnh 10: Th\u1ea3 th\u00eam c\u00e1 gi\u1ed1ng v\u00e0o s\u00f4ng, ao, h\u1ed3 l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. Gi\u1ea3i th\u00edch: Vi\u1ec7c th\u1ea3 c\u00e1 gi\u1ed1ng th\u00eam v\u00e0o s\u00f4ng, ao, h\u1ed3 t\u1ef1 nhi\u00ean s\u1ebd gi\u00fap l\u00e0m t\u0103ng ngu\u1ed3n c\u00e1 \u0111\u00e3 b\u1ecb suy gi\u1ea3m do con ng\u01b0\u1eddi \u0111\u00e1nh b\u1eaft ho\u1eb7c \u0111\u00e3 ch\u1ebft do \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng, hay do c\u00e1c nguy\u00ean nh\u00e2n kh\u00e1c l\u00e0m suy gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng (b\u1ecb c\u00e1c \u0111\u1ed9ng v\u1eadt kh\u00e1c \u0103n th\u1ecbt, b\u1ecb b\u1ec7nh,\u2026). \u2013 GV y\u00eau c\u1ea7u HS k\u1ec3 th\u00eam m\u1ed9t s\u1ed1 vi\u1ec7c l\u00e0m c\u1ee7a b\u1ea3n th\u00e2n ho\u1eb7c ng\u01b0\u1eddi th\u00e2n c\u00f3 th\u1ec3 gi\u00fap gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. GV \u0111\u1ec3 HS ph\u00e1t bi\u1ec3u t\u1ef1 do, ch\u1ecdn l\u1ef1a nh\u1eefng vi\u1ec7c l\u00e0m c\u00f3 li\u00ean quan \u0111\u1ebfn gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n v\u00e0 gi\u1ea3i th\u00edch v\u1ec1 vi\u1ec7c l\u00e0m \u0111\u00f3. GV h\u1ed7 tr\u1ee3, g\u1ee3i \u00fd cho HS gi\u1ea3i th\u00edch \u0111\u00fang v\u1ea5n \u0111\u1ec1. * K\u1ebft lu\u1eadn: C\u00e1c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn s\u1ef1 c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. C\u1ea7n b\u1ea3o v\u1ec7 c\u00e2y xanh, \u0111\u1ed9ng v\u1eadt hoang d\u00e3; kh\u00f4ng s\u1eed d\u1ee5ng thu\u1ed1c b\u1ea3o v\u1ec7 th\u1ef1c v\u1eadt b\u1eeba b\u00e3i; kh\u00f4ng t\u1eadn di\u1ec7t, khai th\u00e1c qu\u00e1 m\u1ee9c c\u00e1c lo\u00e0i sinh v\u1eadt \u0111\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. 170","Ho\u1ea1t \u0111\u1ed9ng 4: X\u1eed l\u00ed t\u00ecnh hu\u1ed1ng * M\u1ee5c ti\u00eau: HS v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc v\u1ec1 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n \u0111\u1ec3 x\u1eed l\u00ed c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS l\u00e0m vi\u1ec7c theo nh\u00f3m \u0111\u00f4i, quan s\u00e1t h\u00ecnh 11, 12 (SGK, trang 120), th\u1ea3o lu\u1eadn v\u00e0 n\u00eau \u00fd ki\u1ebfn \u0111\u1ec3 b\u1ea3o v\u1ec7 v\u00e0 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. G\u1ee3i \u00fd: + H\u00ecnh 11: N\u1ebfu em l\u00e0 b\u1ea1n n\u1eef trong h\u00ecnh th\u00ec em s\u1ebd y\u00eau c\u1ea7u b\u1ea1n nam kh\u00f4ng b\u1eafn chim b\u1eb1ng n\u00e1. Vi\u1ec7c s\u0103n b\u1eafn c\u00e1c lo\u00e0i sinh v\u1eadt hoang d\u00e3 trong t\u1ef1 nhi\u00ean s\u1ebd l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. S\u1ed1 l\u01b0\u1ee3ng chim b\u1ecb suy gi\u1ea3m c\u00f3 th\u1ec3 l\u00e0m c\u00e1c lo\u00e0i s\u00e2u b\u1ecd, c\u00f4n tr\u00f9ng ph\u00e1t tri\u1ec3n, g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e2y tr\u1ed3ng. + H\u00ecnh 12: Vi\u1ec7c d\u00f9ng l\u01b0\u1edbi gi\u00e3 c\u00e0o \u0111\u1ec3 thu c\u00e1c lo\u00e0i thu\u1ef7 h\u1ea3i s\u1ea3n s\u1ebd l\u00e0m suy gi\u1ea3m tr\u1ea7m tr\u1ecdng s\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i sinh v\u1eadt trong c\u00e1c chu\u1ed7i th\u1ee9c \u0103n \u1edf bi\u1ec3n, d\u1eabn \u0111\u1ebfn l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. \u2013 Tu\u1ef3 theo tr\u00ecnh \u0111\u1ed9 c\u1ee7a HS v\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ea1i tr\u01b0\u1eddng, GV c\u00f3 th\u1ec3 thay th\u1ebf b\u1eb1ng c\u00e1c \u0111o\u1ea1n phim ng\u1eafn cho sinh \u0111\u1ed9ng ho\u1eb7c b\u1ed5 sung th\u00eam c\u00e1c t\u00ecnh hu\u1ed1ng (qua h\u00ecnh ch\u1ee5p, h\u00ecnh v\u1ebd ho\u1eb7c \u0111o\u1ea1n video ng\u1eafn) \u0111\u1ec3 HS th\u1ea3o lu\u1eadn v\u00e0 x\u1eed l\u00ed t\u00ecnh hu\u1ed1ng. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 t\u00ecm hi\u1ec3u v\u00e0 k\u1ec3 th\u00eam m\u1ed9t s\u1ed1 ho\u1ea1t \u0111\u1ed9ng l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n ho\u1eb7c gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. Ti\u1ebft 3 Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i nh\u1eefng hi\u1ec3u bi\u1ebft \u0111\u00e3 c\u00f3 c\u1ee7a HS v\u1ec1 vi\u1ec7c gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV \u0111\u01b0a ra 1 \u2013 2 t\u00ecnh hu\u1ed1ng b\u1ea5t k\u00ec li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean ho\u1eb7c gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean b\u1eb1ng \u0111o\u1ea1n phim ng\u1eafn, tranh, \u1ea3nh ho\u1eb7c m\u00f4 t\u1ea3 b\u1eb1ng l\u1eddi n\u00f3i. \u2013 GV y\u00eau c\u1ea7u 2 \u2013 3 HS cho \u00fd ki\u1ebfn \u0111\u00e2u l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean, \u0111\u00e2u l\u00e0 vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. \u2013 GV d\u1eabn d\u1eaft HS v\u00e0o b\u00e0i. \u2013 GV c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau \u0111\u1ec3 HS c\u00f3 th\u1ec3 nh\u1eafc l\u1ea1i \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc li\u00ean quan \u0111\u1ebfn kh\u00e1i ni\u1ec7m c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. Ho\u1ea1t \u0111\u1ed9ng 1: Tr\u00f2 ch\u01a1i \u201cS\u1eafp x\u1ebfp chu\u1ed7i th\u1ee9c \u0103n d\u01b0\u1edbi n\u01b0\u1edbc v\u00e0 tr\u00ean c\u1ea1n\u201d * M\u1ee5c ti\u00eau: HS v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc \u0111\u1ec3 tham gia tr\u00f2 ch\u01a1i v\u00e0 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi li\u00ean quan. 171","* C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV chu\u1ea9n b\u1ecb b\u1ed9 th\u1ebb b\u00eca c\u00f3 h\u00ecnh c\u00e1c sinh v\u1eadt nh\u01b0 h\u00ecnh 13a \u2013 13i (SGK, trang 121). GV c\u00f3 th\u1ec3 d\u00e1n tr\u1ef1c ti\u1ebfp l\u00ean b\u1ea3ng ho\u1eb7c d\u00f9ng nam ch\u00e2m \u0111\u00ednh l\u00ean b\u1ea3ng. GV y\u00eau c\u1ea7u HS l\u00e0m vi\u1ec7c theo nh\u00f3m \u0111\u00f4i, s\u1eafp x\u1ebfp c\u00e1c th\u1ebb h\u00ecnh sinh v\u1eadt v\u00e0 v\u1ebd th\u00eam m\u0169i t\u00ean \u0111\u1ec3 t\u1ea1o th\u00e0nh s\u01a1 \u0111\u1ed3 c\u00e1c chu\u1ed7i th\u1ee9c \u0103n ho\u00e0n ch\u1ec9nh tr\u00ean c\u1ea1n v\u00e0 d\u01b0\u1edbi n\u01b0\u1edbc. \u2013 GV m\u1eddi 2 \u0111\u1ed9i b\u1ea5t k\u00ec l\u00ean b\u1ea3ng c\u00f9ng thi s\u1eafp x\u1ebfp c\u00e1c chu\u1ed7i th\u1ee9c \u0103n theo l\u1ec7nh do GV \u0111\u01b0a ra: H\u00e3y s\u1eafp x\u1ebfp chu\u1ed7i th\u1ee9c \u0103n tr\u00ean c\u1ea1n c\u00f3 ba m\u1eaft x\u00edch; H\u00e3y s\u1eafp x\u1ebfp chu\u1ed7i th\u1ee9c \u0103n d\u01b0\u1edbi n\u01b0\u1edbc c\u00f3 b\u1ed1n m\u1eaft x\u00edch. \u2013 GV y\u00eau c\u1ea7u HS quan s\u00e1t c\u00e1c chu\u1ed7i th\u1ee9c \u0103n \u0111\u00e3 s\u1eafp x\u1ebfp v\u00e0 \u0111\u1eb7t c\u00e2u h\u1ecfi: + Sinh v\u1eadt n\u00e0o l\u00e0 sinh v\u1eadt c\u00f3 th\u1ec3 t\u1ef1 t\u1ed5ng h\u1ee3p ch\u1ea5t dinh d\u01b0\u1ee1ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng n\u01b0\u1edbc v\u00e0 kh\u00ed c\u00e1c-b\u00f4-n\u00edc d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi? + Sinh v\u1eadt n\u00e0o l\u00e0 \u0111\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt, \u0111\u1ed9ng v\u1eadt \u0103n th\u1ecbt? G\u1ee3i \u00fd: + Rau x\u00e0 l\u00e1ch v\u00e0 t\u1ea3o nh\u1ecf l\u00e0 hai lo\u00e0i sinh v\u1eadt c\u00f3 th\u1ec3 t\u1ef1 t\u1ed5ng h\u1ee3p ch\u1ea5t dinh d\u01b0\u1ee1ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng n\u01b0\u1edbc v\u00e0 kh\u00ed c\u00e1c-b\u00f4-n\u00edc d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi. + Sinh v\u1eadt l\u00e0 \u0111\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt: s\u00e2u, \u0111\u1ed9ng v\u1eadt ph\u00f9 du. Sinh v\u1eadt l\u00e0 \u0111\u1ed9ng v\u1eadt \u0103n \u0111\u1ed9ng v\u1eadt: chim s\u00e2u, di\u1ec1u h\u00e2u, t\u00f4m, c\u00e1 tr\u00ea. * K\u1ebft lu\u1eadn: Trong t\u1ef1 nhi\u00ean, s\u1ed1 l\u01b0\u1ee3ng sinh v\u1eadt c\u1ee7a m\u1ed7i m\u1eaft x\u00edch trong chu\u1ed7i th\u1ee9c \u0103n lu\u00f4n \u1ed5n \u0111\u1ecbnh \u1edf m\u1ed9t m\u1ee9c nh\u1ea5t \u0111\u1ecbnh t\u1ea1o n\u00ean s\u1ef1 c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n. Ho\u1ea1t \u0111\u1ed9ng 2: Em t\u1eadp l\u00e0m tuy\u00ean truy\u1ec1n vi\u00ean * M\u1ee5c ti\u00eau: HS v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc v\u1ec1 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean \u0111\u1ec3 tuy\u00ean truy\u1ec1n cho ng\u01b0\u1eddi kh\u00e1c v\u1ec1 l\u1ee3i \u00edch v\u00e0 t\u00e1c h\u1ea1i c\u1ee7a vi\u1ec7c gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS l\u00e0m vi\u1ec7c theo nh\u00f3m, ti\u1ebfn h\u00e0nh v\u1ebd ho\u1eb7c s\u01b0u t\u1ea7m c\u00e1c tranh \u1ea3nh v\u1ec1 nh\u1eefng vi\u1ec7c l\u00e0m b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. GV h\u01b0\u1edbng d\u1eabn HS th\u1ef1c hi\u1ec7n \u1edf nh\u00e0. \u2013 GV \u0111\u1ec1 ngh\u1ecb t\u1eebng nh\u00f3m tr\u01b0ng b\u00e0y s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh, tr\u00ecnh b\u00e0y m\u1ed9t \u0111o\u1ea1n gi\u1edbi thi\u1ec7u, tuy\u00ean truy\u1ec1n v\u1ec1 l\u1ee3i \u00edch c\u1ee7a c\u00e1c vi\u1ec7c l\u00e0m b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. GV m\u1eddi c\u00e1c nh\u00f3m kh\u00e1c nh\u1eadn x\u00e9t v\u00e0 ch\u1ea5m \u0111i\u1ec3m: A (T\u1ed1t), B (\u0110\u1ea1t), C (Kh\u00f4ng \u0111\u1ea1t) cho nh\u00f3m tr\u00ecnh b\u00e0y. \u2013 GV t\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 ch\u1ea5m \u0111i\u1ec3m c\u1ee7a c\u00e1c nh\u00f3m. C\u00f9ng c\u1ea3 l\u1edbp b\u00ecnh ch\u1ecdn nh\u00f3m c\u00f3 s\u1ea3n ph\u1ea9m tuy\u00ean truy\u1ec1n t\u1ed1t nh\u1ea5t v\u00e0 tuy\u00ean d\u01b0\u01a1ng ho\u1eb7c c\u00f3 h\u00ecnh th\u1ee9c khen th\u01b0\u1edfng \u0111\u1ed9ng vi\u00ean. \u2013 GV g\u1ee3i \u00fd v\u00e0 d\u1eabn d\u1eaft \u0111\u1ec3 HS n\u00eau \u0111\u01b0\u1ee3c c\u00e1c t\u1eeb kho\u00e1 trong b\u00e0i: C\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n \u2013 Khai th\u00e1c qu\u00e1 m\u1ee9c \u2013 \u0110\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt \u2013 \u0110\u1ed9ng v\u1eadt \u0103n th\u1ecbt. Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc \u2013 GV y\u00eau c\u1ea7u HS ghi nh\u1edb n\u1ed9i dung Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c (SGK, trang 121), \u0111\u1ed3ng th\u1eddi \u00f4n t\u1eadp v\u00e0 ghi nh\u1edb t\u1ea5t c\u1ea3 c\u00e1c m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c \u1edf 2 ti\u1ebft h\u1ecdc tr\u01b0\u1edbc. \u2013 GV y\u00eau c\u1ea7u HS chia s\u1ebb v\u1edbi ng\u01b0\u1eddi th\u00e2n nh\u1eefng ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c v\u1ec1 nh\u1eefng vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 gi\u00fap gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. 172","B\u00e0i 32. \u00d4N T\u1eacP CH\u1ee6 \u0110\u1ec0 sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng (1 ti\u1ebft) I. Y\u00eau c\u1ea7u c\u1ea7n \u0111\u1ea1t Sau b\u00e0i h\u1ecdc, HS: C\u1ee7ng c\u1ed1 v\u00e0 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c, k\u0129 n\u0103ng \u0111\u00e3 h\u1ecdc trong ch\u1ee7 \u0111\u1ec1 Sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng. II. \u0110\u1ed3 d\u00f9ng d\u1ea1y h\u1ecdc \u2013 GV: C\u00e1c h\u00ecnh trong b\u00e0i 32 SGK, c\u00e1c h\u00ecnh \u1ea3nh c\u00f3 li\u00ean quan do GV chu\u1ea9n b\u1ecb th\u00eam. \u2013 HS: SGK, VBT. III. C\u00c1C Ho\u1ea1t \u0111\u1ed9ng d\u1ea1y h\u1ecdc Ho\u1ea1t \u0111\u1ed9ng kh\u1edfi \u0111\u1ed9ng * M\u1ee5c ti\u00eau: T\u1ea1o h\u1ee9ng th\u00fa v\u00e0 kh\u01a1i g\u1ee3i \u0111\u1ec3 h\u1ecdc sinh nh\u1edb l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc c\u1ee7a ch\u1ee7 \u0111\u1ec1 Sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS thi t\u00ecm nh\u1eefng c\u00e2u h\u00e1t, c\u00e2u th\u01a1 ho\u1eb7c c\u00e2u chuy\u1ec7n,\u2026 vi\u1ebft v\u1ec1 c\u00e1c lo\u00e0i sinh v\u1eadt qua s\u00e1ch, truy\u1ec7n ho\u1eb7c in-t\u01a1-n\u00e9t,... \u2013 GV y\u00eau c\u1ea7u HS n\u00eau hai ho\u1eb7c ba chu\u1ed7i th\u1ee9c \u0103n g\u1ed3m ba m\u1eaft x\u00edch, b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt. \u2013 GV nh\u1eadn x\u00e9t chung v\u00e0 d\u1eabn d\u1eaft v\u00e0o b\u00e0i h\u1ecdc: \u201c\u00d4n t\u1eadp ch\u1ee7 \u0111\u1ec1 Sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng\u201d. Ho\u1ea1t \u0111\u1ed9ng 1: Vi\u1ebft ho\u1eb7c v\u1ebd nh\u1eefng \u0111i\u1ec1u \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c sau ch\u1ee7 \u0111\u1ec1 * M\u1ee5c ti\u00eau: HS vi\u1ebft ho\u1eb7c v\u1ebd \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u \u0111\u00e3 h\u1ecdc sau ch\u1ee7 \u0111\u1ec1 Sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV y\u00eau c\u1ea7u HS d\u1ef1a v\u00e0o c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c, vi\u1ebft m\u1ed9t \u0111o\u1ea1n v\u0103n ng\u1eafn ho\u1eb7c v\u1ebd nh\u1eefng \u0111i\u1ec1u \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c sau ch\u1ee7 \u0111\u1ec1 Sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng. G\u1ee3i \u00fd: Tu\u1ef3 theo tr\u00ecnh \u0111\u1ed9 c\u1ee7a HS, GV c\u00f3 th\u1ec3 g\u1ee3i \u00fd cho HS l\u00e0m m\u1ed9t s\u1ed1 ho\u1ea1t \u0111\u1ed9ng sau: vi\u1ebft t\u00f3m t\u1eaft n\u1ed9i dung c\u00e1c m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c \u1edf c\u00e1c b\u00e0i 30 v\u00e0 31,\u00a0vi\u1ebft t\u1ed5ng quan v\u1ec1 nh\u1eefng \u0111i\u1ec1u \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c trong ch\u1ee7 \u0111\u1ec1, v\u1ebd s\u01a1 \u0111\u1ed3 c\u00e1c kh\u00e1i ni\u1ec7m m\u1edbi \u0111\u00e3 h\u1ecdc trong ch\u1ee7 \u0111\u1ec1, vi\u1ebft c\u1ea3m nh\u1eadn c\u1ee7a HS v\u1ec1 nh\u1eefng \u0111i\u1ec1u \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c trong ch\u1ee7 \u0111\u1ec1, v\u1ebd s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ed1 chu\u1ed7i th\u1ee9c \u0103n b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt, v\u1ebd tranh li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u00e0m gi\u1eef c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n ho\u1eb7c vi\u1ec7c l\u00e0m c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean,\u2026 \u2013 GV y\u00eau c\u1ea7u 2 \u2013 3 HS chia s\u1ebb s\u1ea3n ph\u1ea9m tr\u01b0\u1edbc l\u1edbp. L\u01b0u \u00fd ch\u1ecdn c\u00e1c s\u1ea3n ph\u1ea9m \u0111a d\u1ea1ng v\u1ec1 h\u00ecnh th\u1ee9c, GV c\u00f3 th\u1ec3 ch\u1ecdn c\u00e1c s\u1ea3n ph\u1ea9m ch\u01b0a t\u1ed1t ho\u1eb7c ch\u01b0a ho\u00e0n thi\u1ec7n l\u00ean tr\u00ecnh b\u00e0y tr\u01b0\u1edbc, \u0111\u1ec3 c\u00e1c HS kh\u00e1c nh\u1eadn x\u00e9t, g\u00f3p \u00fd cho s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c ho\u00e0n thi\u1ec7n h\u01a1n. \u2013 GV t\u1ed5 ch\u1ee9c cho HS th\u1ea3o lu\u1eadn, nh\u1eadn x\u00e9t l\u1eabn nhau, gi\u00fap HS nh\u1eadn ra nh\u1eefng v\u1ea5n \u0111\u1ec1 c\u00f2n thi\u1ebfu s\u00f3t \u0111\u1ec3 ho\u00e0n thi\u1ec7n c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh. GV n\u00ean c\u00f3 h\u00ecnh th\u1ee9c khen th\u01b0\u1edfng, cho \u0111i\u1ec3m ho\u1eb7c c\u00e1c h\u00ecnh th\u1ee9c \u0111\u1ed9ng vi\u00ean kh\u00e1c h\u1ee3p l\u00ed \u0111\u1ed1i v\u1edbi nh\u1eefng s\u1ea3n ph\u1ea9m s\u00e1ng t\u1ea1o. 173","Ho\u1ea1t \u0111\u1ed9ng 2: C\u00f9ng th\u1ea3o lu\u1eadn * M\u1ee5c ti\u00eau: HS v\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c \u0111\u00e3 h\u1ecdc \u0111\u1ec3 vi\u1ebft \u0111\u01b0\u1ee3c hai chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch, hai chu\u1ed7i th\u1ee9c \u0103n c\u00f3 b\u1ed1n m\u1eaft x\u00edch b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt v\u00e0 th\u1ea3o lu\u1eadn, trao \u0111\u1ed5i \u0111\u01b0\u1ee3c nh\u1eefng c\u00e2u h\u1ecfi c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc trong ch\u1ee7 \u0111\u1ec1. * C\u00e1ch ti\u1ebfn h\u00e0nh: \u2013 GV t\u1ed5 ch\u1ee9c cho HS l\u00e0m vi\u1ec7c theo nh\u00f3m \u0111\u00f4i, y\u00eau c\u1ea7u HS luy\u1ec7n t\u1eadp v\u1ebd s\u01a1 \u0111\u1ed3 m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt \u1edf ho\u1ea1t \u0111\u1ed9ng 2 (SGK, trang 122) b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u0169i t\u00ean bi\u1ec3u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 th\u1ee9c \u0103n gi\u1eefa c\u00e1c lo\u00e0i sinh v\u1eadt \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u00e1c chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch v\u00e0 b\u1ed1n m\u1eaft x\u00edch \u0111\u1ec1u b\u1eaft \u0111\u1ea7u b\u1eb1ng th\u1ef1c v\u1eadt. \u2013 GV m\u1eddi 2 \u2013 3 HS tr\u00ecnh b\u00e0y c\u00e1c chu\u1ed7i th\u1ee9c \u0103n l\u00ean b\u1ea3ng. G\u1ee3i \u00fd: + M\u1ed9t s\u1ed1 chu\u1ed7i th\u1ee9c \u0103n c\u00f3 ba m\u1eaft x\u00edch: \tL\u00faa \u2192 G\u00e0 \u2192 Chim di\u1ec1u h\u00e2u \tL\u00faa \u2192 Chu\u1ed9t \u2192 R\u1eafn \tL\u00faa \u2192 Chim s\u1ebb \u2192 Chim di\u1ec1u h\u00e2u \tL\u00faa \u2192 Ch\u00e2u ch\u1ea5u \u2192 G\u00e0 \tL\u00faa \u2192 Ch\u00e2u ch\u1ea5u \u2192 Chim s\u1ebb \tC\u1ecf \u2192 G\u00e0 \u2192 Chim di\u1ec1u h\u00e2u \tC\u1ecf \u2192 G\u00e0 \u2192 R\u1eafn + M\u1ed9t s\u1ed1 chu\u1ed7i th\u1ee9c \u0103n c\u00f3 b\u1ed1n m\u1eaft x\u00edch: \tC\u1ecf \u2192 G\u00e0 \u2192 R\u1eafn \u2192 Chim di\u1ec1u h\u00e2u \tL\u00faa \u2192 Ch\u00e2u ch\u1ea5u \u2192 G\u00e0 \u2192 Chim di\u1ec1u h\u00e2u \tL\u00faa \u2192 Chu\u1ed9t \u2192 R\u1eafn \u2192 Chim di\u1ec1u h\u00e2u \tL\u00faa \u2192 Ch\u00e2u ch\u1ea5u \u2192 G\u00e0 \u2192 R\u1eafn \u2013 GV m\u1eddi 3 \u2013 4 c\u1eb7p HS chia s\u1ebb v\u1edbi c\u1ea3 l\u1edbp. GV c\u00f9ng HS nh\u1eadn x\u00e9t, g\u00f3p \u00fd. \u2013 GV \u0111\u1eb7t c\u00e2u h\u1ecfi cho HS: + \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu th\u1eddi ti\u1ebft kh\u00f4 h\u1ea1n k\u00e9o d\u00e0i, d\u1eabn \u0111\u1ebfn c\u1ecf v\u00e0 l\u00faa tr\u00ean m\u1ed9t c\u00e1nh \u0111\u1ed3ng b\u1ecb ch\u1ebft? + Vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean l\u00e0 g\u00ec? + N\u00eau nh\u1eefng vi\u1ec7c em \u0111\u00e3 l\u00e0m \u0111\u1ec3 ch\u0103m s\u00f3c v\u00e0 b\u1ea3o v\u1ec7 c\u00e2y xanh nh\u1eb1m gi\u1eef c\u00e2n b\u1eb1ng c\u00e1c chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. \u2013 GV y\u00eau c\u1ea7u HS th\u1ea3o lu\u1eadn theo nh\u00f3m \u0111\u00f4i \u0111\u1ec3 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi. \u2013 GV m\u1eddi 2 \u2013 3 HS tr\u1ea3 l\u1eddi. Sau m\u1ed7i c\u00e2u h\u1ecfi, GV gi\u00fap HS k\u1ebft lu\u1eadn c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c, ph\u00e2n t\u00edch th\u00eam \u0111\u1ec3 HS kh\u1eafc s\u00e2u ki\u1ebfn th\u1ee9c. 174","G\u1ee3i \u00fd: + N\u1ebfu th\u1eddi ti\u1ebft kh\u00f4 h\u1ea1n k\u00e9o d\u00e0i, d\u1eabn \u0111\u1ebfn c\u1ecf v\u00e0 l\u00faa tr\u00ean m\u1ed9t c\u00e1nh \u0111\u1ed3ng b\u1ecb ch\u1ebft s\u1ebd l\u00e0m m\u1ea5t ngu\u1ed3n th\u1ee9c \u0103n c\u1ee7a c\u00e1c \u0111\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt nh\u01b0 g\u00e0, chim s\u1ebb, ch\u00e2u ch\u1ea5u, chu\u1ed9t, d\u1eabn \u0111\u1ebfn l\u00e0m m\u1ea5t c\u00e2n b\u1eb1ng chu\u1ed7i th\u1ee9c \u0103n trong ru\u1ed9ng l\u00faa. + Vai tr\u00f2 c\u1ee7a th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean l\u00e0 cung c\u1ea5p ngu\u1ed3n th\u1ee9c \u0103n cho c\u00e1c \u0111\u1ed9ng v\u1eadt \u0103n th\u1ef1c v\u1eadt nh\u1edd kh\u1ea3 n\u0103ng t\u1ef1 t\u1ed5ng h\u1ee3p ch\u1ea5t dinh d\u01b0\u1ee1ng t\u1eeb n\u01b0\u1edbc v\u00e0 kh\u00ed c\u00e1c-b\u00f4-n\u00edc d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi. Th\u1ef1c v\u1eadt l\u00e0 m\u1eaft x\u00edch \u0111\u1ea7u ti\u00ean c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean. + M\u1ed9t s\u1ed1 vi\u1ec7c HS c\u00f3 th\u1ec3 l\u00e0m \u0111\u1ec3 ch\u0103m s\u00f3c v\u00e0 b\u1ea3o v\u1ec7 c\u00e2y xanh nh\u1eb1m gi\u1eef c\u00e2n b\u1eb1ng c\u00e1c chu\u1ed7i th\u1ee9c \u0103n trong t\u1ef1 nhi\u00ean l\u00e0 ch\u0103m s\u00f3c c\u00e2y xanh (t\u01b0\u1edbi n\u01b0\u1edbc; vun, x\u1edbi \u0111\u1ea5t cho c\u00e2y; b\u00f3n ph\u00e2n cho c\u00e2y; b\u1eaft s\u00e2u cho c\u00e2y;\u2026); tr\u1ed3ng th\u00eam c\u00e2y xanh trong v\u01b0\u1eddn nh\u00e0, v\u01b0\u1eddn tr\u01b0\u1eddng; kh\u00f4ng b\u1ebb c\u00e0nh, ng\u1eaft hoa, v\u1eb7t l\u00e1; kh\u00f4ng \u0111u tr\u00ean c\u00e0nh c\u00e2y;\u2026 Ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp n\u1ed1i sau b\u00e0i h\u1ecdc GV y\u00eau c\u1ea7u HS v\u1ec1 nh\u00e0 xem l\u1ea1i, \u0111\u1ecdc v\u00e0 ghi nh\u1edb c\u00e1c m\u1ee5c Em \u0111\u00e3 h\u1ecdc \u0111\u01b0\u1ee3c \u1edf c\u00e1c b\u00e0i 30, 31 c\u1ee7a ch\u1ee7 \u0111\u1ec1 Sinh v\u1eadt v\u00e0 m\u00f4i tr\u01b0\u1eddng. 175","Nh\u00e0 xu\u1ea5t b\u1ea3n Gi\u00e1o d\u1ee5c Vi\u1ec7t Nam xin tr\u00e2n tr\u1ecdng c\u1ea3m \u01a1n c\u00e1c t\u00e1c gi\u1ea3 c\u00f3 t\u00e1c ph\u1ea9m, t\u01b0 li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, tr\u00edch d\u1eabn trong cu\u1ed1n s\u00e1ch n\u00e0y. Ch\u1ecbu tr\u00e1ch nhi\u1ec7m xu\u1ea5t b\u1ea3n: T\u1ed5ng Gi\u00e1m \u0111\u1ed1c HO\u00c0NG L\u00ca B\u00c1CH Ch\u1ecbu tr\u00e1ch nhi\u1ec7m n\u1ed9i dung: T\u1ed5ng bi\u00ean t\u1eadp PH\u1ea0M V\u0128NH TH\u00c1I Bi\u00ean t\u1eadp n\u1ed9i dung: NG\u00d4 TH\u1eca LINH PH\u01af\u01a0NG \u2013 NGUY\u1ec4N \u00c1NH LINH Bi\u00ean t\u1eadp m\u0129 thu\u1eadt: B\u00d9I XU\u00c2N D\u01af\u01a0NG Thi\u1ebft k\u1ebf s\u00e1ch: B\u00d9I XU\u00c2N D\u01af\u01a0NG Tr\u00ecnh b\u00e0y b\u00eca: \u0110\u1eb6NG NG\u1eccC H\u00c0 Minh ho\u1ea1: PHAN TH\u1eca NG\u1eccC ANH S\u1eeda b\u1ea3n in: NG\u00d4 TH\u1eca LINH PH\u01af\u01a0NG \u2013 NGUY\u1ec4N \u00c1NH LINH Ch\u1ebf b\u1ea3n: C\u00d4NG TY C\u1ed4 PH\u1ea6N D\u1ecaCH V\u1ee4 XU\u1ea4T B\u1ea2N GI\u00c1O D\u1ee4C GIA \u0110\u1ecaNH B\u1ea3n quy\u1ec1n thu\u1ed9c Nh\u00e0 xu\u1ea5t b\u1ea3n Gi\u00e1o d\u1ee5c Vi\u1ec7t Nam. T\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n c\u1ee7a n\u1ed9i dung cu\u1ed1n s\u00e1ch n\u00e0y \u0111\u1ec1u kh\u00f4ng \u0111\u01b0\u1ee3c sao ch\u00e9p, l\u01b0u tr\u1eef, chuy\u1ec3n th\u1ec3 d\u01b0\u1edbi b\u1ea5t k\u00ec h\u00ecnh th\u1ee9c n\u00e0o khi ch\u01b0a c\u00f3 s\u1ef1 cho ph\u00e9p b\u1eb1ng v\u0103n b\u1ea3n c\u1ee7a Nh\u00e0 xu\u1ea5t b\u1ea3n Gi\u00e1o d\u1ee5c Vi\u1ec7t Nam. KHOA H\u1eccC 4 - S\u00c1CH GI\u00c1O VI\u00caN (CH\u00c2N TR\u1edcI S\u00c1NG T\u1ea0O) M\u00e3 s\u1ed1: G2HG4K001M23 In\u2026\u2026\u2026b\u1ea3n, (Q\u0110 in s\u1ed1\u2026.) Kh\u1ed5 19 \u00d7 26,5 cm. \u0110\u01a1n v\u1ecb in:\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.. C\u01a1 s\u1edf in:\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026 S\u1ed1 \u0110KXB: 10-2023\/CXBIPH\/46-2157\/GD S\u1ed1 Q\u0110XB:......... ng\u00e0y \u2026. th\u00e1ng\u2026. n\u0103m 20 ... In xong v\u00e0 n\u1ed9p l\u01b0u chi\u1ec3u th\u00e1ng \u2026.n\u0103m 20\u2026. M\u00e3 s\u1ed1 ISBN: 978-604-0-35248-4 176","HU\u00c2N CH\u01af\u01a0NG H\u1ed2 CH\u00cd MINH B\u1ed8 S\u00c1CH GI\u00c1O VI\u00caN L\u1edaP 4 \u2013 CH\u00c2N TR\u1edcI S\u00c1NG T\u1ea0O 1. TI\u1ebeNG VI\u1ec6T 4 \u2013 T\u1eacP M\u1ed8T 8. TIN H\u1eccC 4 S\u00e1ch gi\u00e1o vi\u00ean S\u00e1ch gi\u00e1o vi\u00ean 2. TI\u1ebeNG VI\u1ec6T 4 \u2013 T\u1eacP HAI 9. C\u00d4NG NGH\u1ec6 4 S\u00e1ch gi\u00e1o vi\u00ean S\u00e1ch gi\u00e1o vi\u00ean 3. TO\u00c1N 4 10. GI\u00c1O D\u1ee4C TH\u1ec2 CH\u1ea4T 4 S\u00e1ch gi\u00e1o vi\u00ean S\u00e1ch gi\u00e1o vi\u00ean 4. TI\u1ebeNG ANH 4 Family and Friends 11. \u00c2M NH\u1ea0C 4 (National Edition) \u2013 Teacher's Guide S\u00e1ch gi\u00e1o vi\u00ean 5. \u0110\u1ea0O \u0110\u1ee8C 4 12. M\u0128 THU\u1eacT 4 (B\u1ea2N 1) S\u00e1ch gi\u00e1o vi\u00ean S\u00e1ch gi\u00e1o vi\u00ean 6. KHOA H\u1eccC 4 13. M\u0128 THU\u1eacT 4 (B\u1ea2N 2) S\u00e1ch gi\u00e1o vi\u00ean S\u00e1ch gi\u00e1o vi\u00ean 7. L\u1ecaCH S\u1eec V\u00c0 \u0110\u1ecaA L\u00cd 4 14. HO\u1ea0T \u0110\u1ed8NG TR\u1ea2I NGHI\u1ec6M 4 (B\u1ea2N 1) S\u00e1ch gi\u00e1o vi\u00ean S\u00e1ch gi\u00e1o vi\u00ean 15. HO\u1ea0T \u0110\u1ed8NG TR\u1ea2I NGHI\u1ec6M 4 (B\u1ea2N 2) S\u00e1ch gi\u00e1o vi\u00ean C\u00e1c \u0111\u01a1n v\u1ecb \u0111\u1ea7u m\u1ed1i ph\u00e1t h\u00e0nh \u2022 Mi\u1ec1n B\u1eafc: CTCP \u0110\u1ea7u t\u01b0 v\u00e0 Ph\u00e1t tri\u1ec3n Gi\u00e1o d\u1ee5c H\u00e0 N\u1ed9i CTCP S\u00e1ch v\u00e0 Thi\u1ebft b\u1ecb Gi\u00e1o d\u1ee5c mi\u1ec1n B\u1eafc \u2022 Mi\u1ec1n Trung: CTCP \u0110\u1ea7u t\u01b0 v\u00e0 Ph\u00e1t tri\u1ec3n Gi\u00e1o d\u1ee5c \u0110\u00e0 N\u1eb5ng CTCP S\u00e1ch v\u00e0 Thi\u1ebft b\u1ecb Gi\u00e1o d\u1ee5c mi\u1ec1n Trung \u2022 Mi\u1ec1n Nam: CTCP \u0110\u1ea7u t\u01b0 v\u00e0 Ph\u00e1t tri\u1ec3n Gi\u00e1o d\u1ee5c Ph\u01b0\u01a1ng Nam CTCP S\u00e1ch v\u00e0 Thi\u1ebft b\u1ecb Gi\u00e1o d\u1ee5c mi\u1ec1n Nam CTCP S\u00e1ch v\u00e0 Thi\u1ebft b\u1ecb Gi\u00e1o d\u1ee5c C\u1eedu Long S\u00e1ch \u0111i\u1ec7n t\u1eed: http:\/\/hanhtrangso.nxbgd.vn K\u00edch ho\u1ea1t \u0111\u1ec3 m\u1edf h\u1ecdc li\u1ec7u \u0111i\u1ec7n t\u1eed: C\u00e0o l\u1edbp nh\u0169 tr\u00ean tem \u0111\u1ec3 nh\u1eadn m\u00e3 s\u1ed1. Truy c\u1eadp http:\/\/hanhtrangso.nxbgd.vn v\u00e0 nh\u1eadp m\u00e3 s\u1ed1 t\u1ea1i bi\u1ec3u t\u01b0\u1ee3ng ch\u00eca kho\u00e1. Gi\u00e1: ....... \u0111"]