Class-5

Mathematics  The size of an angle is measured by the amount of turn or rotation of two arms but not by the length of arms. Exercise - 7 Q. Measure all the angles and decide the greatest angle in (a), (b) or (c). a) b) c) Day-8 Activity:(Geometry)  Types of angles. i) Acute angle: between 00 to 900 iv) Straight angle: exactly 1800 ii) Right angle: exactly 900 v) Reflex angle: between 1800 to 3600 iii) Obtuse angle: between 900 to 1800 vi) Complete angle: exactly 3600 Exercise - 8 Q. Estimate the size of the given angles and clarify the angles with their size. a) b) c) Activity:(Geometry) Day-9  Follow pg. 8 (text book) --51--  Also see activity - 8

Exercise - 9 Class-5 Q. Classify the given angles into acute, obtuse, right, straight or reflex angle. a) 300 b) 900 c) 1300 d) 1850 Activity:(Geometry) Day-10  Finding the value of 'x' .  Right angle is measure 900. Example: B Solution: Here, 2x ≮ BUN = 900 [∴ right angle] U or, 2x = 900 or, x = 900 2 N ∴ x = 450 Exercise - 10 R Q. Find the value of 'x' if the given 6x angle is right angle. A X Day-11 Activity: (Geometry)  Finding the value of 'x' when Straight angle is measure 1800 Example: Solution: Here, ≮PQR = 1800 2x + 100 [∴ straight angle] or, 2x + 100 = 1800 PQ R or, 2x = 1800 - 10 or, 2x = 1700 or, x = 170 2 ∴ x = 850 Exercise - 11 Q. Find the value of 'x' in the 2x + 20 given angle is straight angle. --52--

Mathematics Day-12 Activity:(Geometry)  Find the value of 'x' if the given angle is acute. Exercise - 12 A Q. In the adjoining figure, 2x ≮ABC = 600. Find the value of x. C B Day-13 Activity:(Geometry) Solution: Here, x + 3x = 1800  Follow Activity - 11 Example: [∴ straight angle] x 3x or, 4x = 1800 or, x = 180 0 4 ∴ x = 450 Exercise - 13 5x x Q. If the sum of x and 5x together give the value of a straight angle then find the value of x. Activity:(Geometry) Day-14  Follow Activity - 10 Example: Solution: Here, 600 + x = 900 [∴ Right angle] 600 X or, x = 900 - 600 ∴ x = 300 --53--

Class-5 Exercise - 14 x Q. Find the value of 'x' if the sum 350 of two angles make a right angle. Day-15 Activity:(Geometry)  Drawing a triangle by joining dots. Exercise - 15 B Q. Join the three points S,A and M using ruler. What figure do you get? Name it. A M Activity:(Geometry) Day-16 A vertex side angle side vertex B side C Vertex  A triangle is a three sided closed figure. Name: ∆ABC or ∆BCA or ∆CAB Sides: AB, BC and CA Vertices: A, B, C Angles: ≮A, ≮B and ≮C Exercise - 16 Q. Name the given triangle. Also its sides, J L vertices and angles. Name : _____________ Sides : _____________ Vertices : _____________ K Angles : _____________ --54--

Mathematics Day-17 Activity: (Geometry)  Drawing a triangle. Exercise - 17 Q. Take three non - collinear points A, B and C. Then join AB, BC and CA. What figure do you get? Name: a) The side opposite to ≮A: _____________ b) The side opposite to ≮B: _____________ c) The angle opposite to AB: _____________ d) The angle opposite to BC: _____________ Day-18 Activity: (Geometry)  Angles of a triangle form a straight angle. So, the sum of the measure of angles of a triangle is 1800.  See the experiment pg. 14(text book) Exercise - 18 Q. Measure the given angles of a triangle and find the sum of the angles. Example: i) A 700 500 60 0 BC Solution: Here, we have, ≮A = 700, ≮B = 500 and ≮C = 600 Now, ≮A + ≮B + ≮C = 700 + 500 + 600 = 1800 ∴ The sum of the angles of a triange is 1800 P ii) QR --55--

Day-19 Class-5 Activity: (Geometry)  Finding the missing angle of a triangle. A Example: x B 800 500 C Solution, Here, we have, ≮A = x, ≮B = 800 and ≮C = 500 Now, ≮A + ≮B + ≮C = 1800 [∴ sum of the angle of a ∆'le is 1800] or, x + 800 + 500 = 1800 or, x + 1300 = 1000 or, x = 1800 - 1300 ∴ x = 500 Exercise - 19 Q. Find the value of unknown angle from the given figure. M 2x N 60 XO M 0 Day-20 Activity: (Geometry)  Follow Activity – 19 Exercise– 20 Q. In triangle XYZ, ≮X = 1000, ≮Y = 300. Find ≮Z Day-21 Activity: (Geometry)  Follow Activity - 19 and 20.  Sum of the angles of a triangle is 180. --56--

Mathematics  Right - angled triangle is 900. Exercise - 21 Q. In a right - angled triangle if one angle is 700. Find its third angle. Day-22 Activity: (Geometry)  There are three types of triangle according to angles.  See pg. - 18 types of triangle. Exercise - 22 Q. Classify the triangle into acute triangle, obtuse triangle and right triangle. a) 600, 600, 600 b) 600, 300, 900 c)1200, 300, 300 Day-23 Activity: (Geometry)  Meaning and identifying the triangle according to angles. Exercise Q. Measure the angles of triangles using protractor. Identify each triangle as acute, right or obtuse. b) L a) S T UM N Day-24 Activity: (Geometry)  There are three types of triangle according to sides.  Follow pg. 21 (textbook) and study the table. Exercise Q.Classify the triangles as equilateral, isosceles and scalene triangle. a) 3cm, 4cm, 5cm b) 8cm, 8cm, 8cm c) 6cm, 6cm, 7cm --57--

Day-25 Class-5 S Activity: (Geometry)  Measuring the sides of a triangle. U Exercise Q. Measure the sides and identify the triangle as equilateral, isosceles or scalene triangle. T Day-26 Activity: (Geometry)  Finding whether it is possible to have a triangle with given sides.  Sum of any two sides is longer than the remaining sides. Example: 6cm, 7cm, 8cm Solution: The given sides are 6cm, 7cm and 8cm. Now, 6cm + 7cm = 13cm> 8cm 7cm + 8cm = 15cm > 6cm 6cm + 8cm = 14cm >7cm Here, a triangle with these sides is possible. Exercise Q. Is it possible to have a triangle whose sides are 3cm, 4cm and 5cm. Day-27 Activity: (Geometry)  Quadrilateral is denoted by the symbol ''.  AD It has 4 sides, 4 angles and 4 vertices. BC Name:  ABCD or  BCDA or CDAB or  DABC Sides: AB, BC, CD and AD Vertices: A, B, C and D Angles: ≮A, ≮B, ≮C and ≮D --58--

Mathematics Exercise - 27 Q. Name the given quadrilateral. Also, name its sides, vertices and angle. RE Name: _____________ Sides: _____________ Vertices: _____________ Angles _____________ OS Day-28 Activity: (Geometry)  The sum of angles of a quadrilateral is 3600.  Follow pg. 24 (experimental) text book. Exercise - 28 Q. From the given figure, find the value of 'x'. a) W Z 1200 1200 XX XY Example: Solution: Here, ≮w + ≮x + ≮y + ≮z = 3600 [∴ Sum of the angles of a quadrilater is 3600] or, 1200 + x + x + 1200 = 3600 or, 2x + 240 = 3600 or, 2x = 3600 - 2400 or, 2x = 1200 or, x = 120 0 ∴ x = 600 2 Thus, the measure of ≮x = 600 and ≮y = 600 b) A 1210 690 D B 800 X C --59--

Class-5 Day-29 Activity: (Geometry)  Follow Activity - 28 Exercise - 29 Q. Three angles of a quadrilateral are given. Find the one indicated by a letter. b) 900, 800, 700 and y0 a) 1020, 1070, 700 and x0 Day-30 Activity: (Concepts of numbers)  Counting numbers up to 10 - digits.  We read smallest ten digit number as one Arab.  Follow pg. - 32 (place value table) Exercise - 30 Q. Write the number name of the following numbers in National system. a) 6781253650 b) 9749655217 Self Evaluation Test Name: __________ F.M.: 50 P.M.: ___ Class : 5 [5×1=5] (Objectives) 900 Q.1. Choose the correct option: 9 7,00,000 a) The symbol _______ is used to denote an angle. 1 i) ∆ ii)  iii) ≮ b) The sum of the angles of a triangle is _______. i) 1800 ii) 1200 iii) c) The square of 3 is ______. i) 3 ii) 6 iii) d) The place value of 7 in 672348 is ______. i) 7,000 ii) 70,000 iii) e) 2 + (6 - 5) = ________ i) 3 ii) 2 iii) --60--

Mathematics [5x1=5] Group 'B' Q.2 Match the following. 4 Group 'A' Smallest 10 - digit Obtuse angle i) between 900 to 1800 8 ii) Isosceles triangle iii) 1 Arab iv) 5 ÷ 5 + 3 v) 23 Q.3 Write 'T' for true and 'F' for false. [5x1=5] a) An angle has two arms. b) Obtuse triangle has one obtuse angle. c) 1 million = 1 crore. d) 1 in neither prime nor composite. e) 3 x (3 - 2) = 4 Q.4 Fill in the blanks from the given box. [5x1=5] 30, Division, 4, 0, Square a) A quadrilateral has 4 sides, 4 angles and _____ vertices. b) Right angle has ______ corner. c) The place value of 0 is always _______. d) The nearest ten of 26 is ________. e) In simplification DMAS, D means _______. (Subjectives) Q.5 Complete the following: (3) A Name: ___________ Arms: ____________ B Vertex: ___________ C Q.6 Draw angle of 1100 using protractor. (3) --61--

Q.7 Find the value of Class-5 missing angle from P the given figure. (3) x Q 750 600 R H Q.8 In the adjoining 1100 K figure, find the 750 Q.9 Q.10 value of 'x'. (3) Q.11 Q.12 1200 J Q.13 Q.14 x I Write the number name of 963218507 in both system. (4) Find the prime factors of 1600. (3) Find the cube root of 64. (3) Simplify: 20 ÷ 5 + 15. (2) Simplify: [100 + {30 - (5 x 2)}] ÷ 15. (3) Divide the product of 10 and 8 by the difference of 12 and 2. (3) Day-31 Activity: (Concepts of numbers)  Numbers name into numeral. Exercise - 31 Q. Write the numeral for the given information, The population of Nepal in 2068 is two crore sixty four lakh ninety four thousand five hundred and four. Day-32 Activity: (Concepts of numbers)  The place value of 0 is always 0.  The face value of a digit is the digit itself.  Follow the place value chare (pg. 34) Exercise - 32 Q. Write the place value of the digits 5 and 6 in the given numbers. a) 5,73,68,02,149 --62-- b) 64,32,45,810

Mathematics Day-33 Activity: (Concepts of numbers)  Expanded form of numbers in three different way. Example: 85, 36, 25, 988 i) 8 ten crore + 5 crore + 3 ten lakh + 6 lakh + 2 ten thousand + 5 thousand + 9 hundred + 8 tens + 8 one ii) 8 x 10,00,00,000 + 5 x 1,00,00,000 + 3 x 10,00,000 ÷ 6 x 1,00,000 + 2 x 10,000 + 5 x 1000 + 9 x 100 + 8 x 10 + 8 iii) 80,00,00,000 + 5,00,00,000 + 30,00,000 + 6,00,000 + 20,000 + 5,000 + 900 + 80 + 8 Exercise - 33 Q. Write 243987651 in expanded form in three different way. Day-34 Activity: (Concepts of numbers)  See example pg. 35 (text book)  Writing in Standard form. Exercise– 34 Q. Write in standard form. i) 6 x 10,00,00,000 + 9 × 1,00,00,000 + 5 × 10,00,000 + 3 x 10,000 + 7 × 1,000 + 2 x 100 + 5 × 10 × 6 Day-35 Activity: (Concepts of numbers)  Start counting from extreme right.  National system in known as Hindu Arabic System. Periods Arab Crores Lakhs Thousand Ones 3 - digits 2 - digits 2 - digits 2 - digits 2 - digits , Commas , , , , Exercise - 35 Q. Write commas to separate the periods. i) 4068150322 ii) 5891027316 --63--

Day-36 Class-5 Activity: (Concepts of numbers)  International system of writing numbers.  See pg. 37 (textbook) for international place value chart.  Place value in international system. Exercise - 36 Q. Write the place value of the underline digits: Example: i) 63,054,321 = 60,000,000 ii) 5,32,987,632 iii) 29,305, 821 Day-37 Activity: (Concepts of numbers)  Writing number in words. Exercise - 37 Q. Write 835,560,289 in words in international system. Day-38 Activity: (Concepts of numbers)  Number name in numerals according to international system. Exercise - 38 Q. Write in numerals in the international system. Seventy four million one hundred forty two thousand nine hundred fifty - five. Day-39 Activity: (Concepts of numbers)  Follow Activity 36 and 37 Exercise - 39 Q. Write the given number in words and also write the place value of underlined digit in international system. a) 8320000000 b) 65710000 --64--

Mathematics Day-40 Activity: (Concepts of numbers) Example: 915,326,880 = 915 million 326 thousand and 880 Exercise - 40 Q. Fill in the blanks: i) 732,652,006 = _______ million ______ thousand and _____ . ii) 325,666,723 = _______ million ______ thousand _______. Day-41 Activity: (Concepts of numbers)  Comparison between national and international system. * 1 lakh = 100 thousands * 10 lakhs = 1 million * 1 crore = 10 millions * 10 crores = 100 millions Exercise - 41 Q. Rewrite the following numbers using commas in national and international system: S.N. Given number National system International system i) 51147633 5,11,47,633 51,147,633 ii) 352906729 ___________ ___________ iii) 589062113 ___________ ___________ Day-42 Activity: (Concepts of numbers)  Smallest 6 - digit number is 100000.  Greatest 6 - digit number is 999999.  Smallest 7 - digit number is 1000000.  Greatest 7 - digit number is 9999999.  Smallest 8 - digit number is 10000000.  Greatest 8 - digit number is 99999999. --65--

Exercise - 41 Class-5 Q. Write the 9 - digit smallest and the largest numbers in words. (in both the system). Day-42 Activity: (Concepts of numbers)  1 is neither prime nor composite.  2 is the lowest and the only even prime number.  Read prime number and composite numbers. Pg. 41 (text book) Exercise - 42 f) 265 Q. Write P for prime and C for composite numbers. a) 6 b) 11 c) 15 d) 24 e) 100 Day-43 Activity: (Concepts of numbers)  Follow the activities shown in pg. 41 for prime and composite number. Exercise - 43 Q. Write all prime numbers between 40 to 60. Q. Write first 5 prime numbers. Day-44 Activity: (Concepts of numbers)  If the digit is less than 5, round down the number and if it is equal to 5 or more than 5 round up the number. 10 11 12 13 14 15 16 17 18 19 20 Exercise - 44 Q. Round off the numbers to the nearest ten. a) 25 b) 144 --66--

Mathematics Day-45 Activity: (Concepts of numbers)  Follow Pg. 42 example (i)  Nearest ten thousand Exercise - 45 Q. Round off the numbers to the nearest ten thousand. a) 63,154 b) 78,668 Day-46 Activity: (Concepts of numbers)  Follow Pg. 42 example (ii)  Nearest lakh Exercise - 46 Q. Round off the numbers to the nearest lakh. a) 2,49,621 b) 5,62,340 Day-47 Activity: (Concepts of numbers)  A square number is the product of two same numbers. eg: square of 2 = 2 x 2 = 4 Exercise - 47 a) 6 b) 15 Q. Find the square of: Day-48 Activity: (Concepts of numbers)  If a number is expressed as the product of two same numbers, than each of them is called the square root of the other number. Example: Square root of 1 = 1 Square root of 4 = 2 Square root of 9 =3 Exercise - 48 Q. Find the square root of: a) 25 Example: Solution: Here, square root of 25 = 5 x 5 = 5 b) 144 c) 81 --67--

Class-5 Day-49 Activity: (Concepts of numbers)  Follow Activity 48 Exercise - 49 Q. What number multiplied by itself will give the product 1600? Day-50 Activity: (Concepts of numbers)  2 cube = 23 = 2×2×2 = 8  1 cube = 13 = 1×1×1 = 1 Exercise - 50 b) 13 Q. Find the cube of 4 a) 4 Day-50 Activity: (Concepts of numbers)  Cube root of 1 is 1  Cube root of 8 is 2×2×2 = 2  Follow example ii) Pg. 45(text book) Exercise - 51 b) 729 Q. Find the cube root of: a) 27 Day-52 Activity: (Concepts of numbers)  Also follow Activity - 49  Word problem of square root. Exercise - 52 Q. There are 196 men in a group. How many men should be in one line to make a square shape? Day-53 Activity: (Concepts of numbers)  Prime factorization with tree  1 is a factor of every number.  Any number is a factor of itself. method. --68--

Mathematics Exercise - 53 Q. Write the prime factors of the given number by factor tree method. a) 27 27 Example: 3 ×9 Prime factor of 27 are 3,3 and 3 3 × 3× 3 b) 48 c) 80 Day-54 Activity: (Concepts of numbers)  Follow Activity : 53 Exercise– 54 b) 10 Q. Complete the factor tree. a) 16 2× 5 2× 2× 2× ×2 × 16 = _________________ 10 = _____________ Day-55 Activity: (Concepts of numbers)  Product of prime factors by Division method. --69--

Exercise - 55 Class-5 Q. Find the product of prime factor by division method. Example: a) 18 b) 120 Solution: Here, 2 18 39 33 1 ∴ 18 = 2 × 3 × 3 Day-56 Activity: (Order of Operations)  Simplification using DMAS D - Division M - Multiplication A - Addition S - Subtraction Exercise - 56 b) 60 + 50 ÷ 5 -15 Q. Simplify: Example: a) 75 ÷ 15 × 3 + 42 - 30 = 5 × 3 + 42 - 30 = 15 + 42 - 30 = 57 - 30 = 27 Day-57 Activity: (Order of Operations)  Simplification using BODMAS  Follow the order of simplification along with brackets. Pg. 56 [{( )}] examples. Exercise– 57 b) 60 ÷ 15 x (20 - 10) Q. Simplify: a) 80 + [20 x {20 - (10 ÷ 5)}] Day-58 Activity: (Order of nOperations)  Word problems on order of operations. --70--

Mathematics  Also follow example Pg. 57 Exercise - 58 Q. Find the sum of 35 and the difference between 16 and 10. Day-59 Activity: (Order of Operations)  Follow example Pg. 57 Exercise - 59 Q. What is the value when 18 times of the difference of 15 and 12 divided by 6 ? Day-60 Activity: (Order of Operations)  Changing into Mathematical expression and simplifying. Exercise - 60 Q. Add the quotient of 100 divided by 10 to the product of 6 and 7. Self Evaluation Test Subject: Mathematics Time: 3:00 hrs F.M.: 100 Class: Five Group A (Objectives) 1. Choose the correct answer from the given alternatives and tick the correct answers. (10×1=10) a) The sum of measure of a quadirilateral is ______________. i) 3600 ii) 900 iii) 1800 b) The instrument used to measured angle is ______. i) Protactor ii) Ruler iii) Compas c) Acute angle is measured between ____________. i) 00to 900 ii) 900 to 1800 iii) 1800to 3600 d) There are ________ sides in a triangle. i) 2 ii) 3 iii) 4 --71--

e) __________ is neither prime nor composite. Class-5 ii) 1 ii) 1 iii) 2 f) The cube of 1 is ______. i) 1 ii) 2 iii) 3 g) 6,00,00,000+80,00,000+5,00,000+30,000+1,000+50+5 = _________. i) 68530155 ii) 68531055 iii) 88531550 h) Smallest 8 digit number is ____________________. i) 1 Crore ii) 1 Lakh iii) 10 Lakh i) 15+3÷ 3 = _________________ i) 6 ii) 10 iii) 16 j) In 5(2+3), which operation is performed in between 5 and (2+3)? i) Addition ii) Subtraction iii) Multliplication 2. Match the following: 10×1=10 a) Group 'A' Group 'B' 6,00,000 Sum of measure of triangle 7300 Place value of 6 in 96,40,735 Right angle 9,99,999+1 1800 7252 Rounded to nearest hundred10,00,000 b) Group 'A' Group 'B' Example of obtuse angle 5X4 The square of 4 is simplification 5 times of 4 is 50 DIAMS 1100 5X(2+8) 16 3. Write True of False. (10×1=10) a) In equilateral triangle, all sider are equal. b) 550, 600, 650 is obtuse triangle. c) A quadrilateral has 4 vertices and 4 angles. d) The place value of 0 is always 0. e) A square number is the product of two same numbers. f) 6 hundred thousand = 60,000. g) 2 is the only odd prime number. h) 4×4÷ 4 ������������������������������������ 4. i) In DMAS, 'M' stand for Multiplication. j) The first operation in simplification is within { } --72--





















Science Day-20 Chapter: Matter Activity-1 There are various types of substances in our environment like air, water, soil, stone, animals, plants etc. They have different weight and volume. They occupy certain space. They have different state like solid, liquid and gas. They are known as matter. Matter is anything that has mass and occupies space. Everything around us is made up of matter. Activity-2 2. What are states of matter? 1. Define matter. Day-21 Activity-1 Change of state : We know that matters have three state. They are solid, liquid and gas. Solid are ice, iron, utensils etc. Liquids are water, honey etc. Gases are air, smoke etc. Let us take an example of water. Water is a liquid. When water is cooled, it becomes ice. Ice is solid. When water is heated, it starts boiling and become vapour. Vapour is gas. When the temperature is changed, then the state of matter is also changed. One state of matter changes into another state when the matter is heated or cooled. When one state of matter is changed into another state by heating and cooling, then it is called change in state. Activity-2 1. What is change of state? 2. Give few examples of solid, liquid and gas. Day-22 Activity-1 Molecular arrangement of solid, liquid and gas : Every matter are made up of tiny particles called molecules. The arrangement of molecules is different in different matters. --83--

Class-5 In solids, molecules are tightly packed. Due to this packing solids have fixed shape and size. In liquids, molecules are loosely packed than solids. In gas, molecules are very loosely packed. When heat is applied to solids, the molecules present in solid push each other and make distance between them. This arrangement now turns solid into liquid.When this liquid is further heated, molecules again apart far away. This arrangement now turns liquid into gases. Similarly, when gas is cooled, the molecules of gas come nearer than before. Here, the gas changes into liquid.When the liquid is cooled, the molecules come more nearer and are packed tightly. Here the liquid changes into solid. Activity-2 1. Why solids have fixed shape and size? 2. What happens when gas is cooled? Day-23 Activity-2 Melting : When you put ice cubes in your hand for longer period of time, the ice starts converting into water. When you hold icecream in your hand at sunshine for longer period of time, ice cream starts changing into liquid. The process of converting solid into liquid on heating is called melting. Activity-2 1. Define melting with suitable examples. Day-24 Activity-1 Vaporization : When you boil the water for some time and stop boiling, you will find that the amount of water is decreased. Also during boiling you will notice that a gas is rising from the liquid, The gas rising from liquid while the liquid is boiling is called vapor. The process of changing of liquid into vapor using heat is called vaporization. --84--

Science Activity -2 1. Define vaporization with suitable examples. Day-25 Activity 3.11 Condensation : We have read already that when solid is heated, it melts and change into liquid. When liquid is heated, it vaporizes and changes into gas. Similarly when we cool down the gas, it changes into liquid. The process of changing the gas into liquid on cooling is called condensation. Activity-2 1. Define condensation with suitable examples. Day-26 Activity-1 Freezing : We have read already that when solid is heated, it melts and change into liquid. When liquid is heated, it vaporizes and changes into gas. Similarly when we cool down the gas, it changes into liquid. And sequentially, when we cool the liquid, it changes into solid. The process of changing the liquid into solid on cooling is called freezing. Activity-2 1. Define freezing with suitable examples. Day-27 Activity-1 Sublimation : We already know that, when we heat solids, solid changes into liquid. There are some solid also which on heating directly changes into gas. And if we cooled the same gas, it changes into solid directly. --85--

Class-5 The process of changing solid into gas on heating and changing of gas into solid on cooling is called sublimation. Activity -2 1. Define sublimation with examples. Day-28 Activity -1 1. The arrangement of molecules in solids are …………… 2. Forming cloud from water is called ……………. 3. Matter is found in ………….. states. 4. Making ice cream from milk is an example of …………… 5. High mountains are snowy in winter, why? Activity-2 1. During evaporation liquid changes into ………….. 2. When solid is heated, it changes into ……….. 3. Liquid on heating changes into …………… Day-29 Chapter: Our Planet Earth Activity-1 You may have different types of clothes in your wardrobe. Some clothes are woolen and some are cotton clothes. You wear woolen clothes in cold to make you warm while you wear cotton clothes in hot to make you cool. You can select the type of clothes you wear by looking at the condition of the outside also. If it is very sunny outside, you wear thin clothes and if it is raining outside, you carry umbrella and wear warm clothes. Even in a single day, you may see the condition of outside is changing. Sometime it may be windy, sometime it may be hot, and sometime it may be rainy. The temporary description made by observer about the condition of atmosphere of a place is called weather. Activity-2 1. Define weather. --86--

Science Day-30 Activity-1 Factors affecting the weather Temperature : Temperature tells us how hot or cold a Day-is. If the temperature is more, the Day-will be hot and if the temperature is less, the Day-will be cool. If the temperature is average, the Day-will be pleasant. Temperature is not same throughout the day. In morning if temperature may be less and at Day-time, temperature may be more or high. In 24 hours, generally days are hotter than night because of presence of sun during Day- time. At mid-day, the temperature becomes maximum because at that time the sun rays are direct. Temperature is measure by thermometer. Activity-2 2. How temperature is measured? 1. What is temperature? Day-31 Activity-2 Wind : Moving air is called wind. During wind condition, the weather of the place is cool. The direction of the wind is found by looking at weather cock and the speed of wind is measured by a special instrument called anemometer. Activity -2 1. What is wind? 2. Mention two factors of weather change. Day-32 Activity-1 Cloud : Cloud is a gas that carries water in it. When the cloud is cooled, it drops down in earth as rain. During it the sky, cloud blocks the sun rays entering into the surface of earth also making the weather cool. Activity -2 2. Define cloud. 1. Which Day-is cool day? --87--

Class-5 Day-33 Activity-1 Rain : The water falling from the cloud in earth’s surface is called rain. Rain decreases the temperature and makes the weather cool. Rainfall is measured by rain gauze. Humidity : The amount of water present in air is called humidity. Higher humidity means cold weather and low humidity means dry or hot weather. Activity -2 1. Define humidity. 2. Which instrument measures rainfall? Day-34 Activity-1 Types of cloud : When you observe the sky, we see some white cotton like structure along with blue sky. Do you know what it is? Yes, you guessed it right. It is cloud. A cloud is a grey or white cotton like structure floating in the sky. When you see cloud for a long period of time, you may see different images in sky. So, observing cloud in a sky is interesting thing. There are mainly four types of cloud. They are; Cumulus, Stratus, Cirrus and Nimbus. Activity-2 1. Observe a cloud and say what type of image you see. 2. Name the types of clouds. Day-35 Activity -1 Cumulus : This is called low cloud. This is clear white and popcorn like cloud. They are seen as scattered in the sky. They carry water. Stratus : It is very low cloud. It appears grey and seems scattered. It also carries water in it. Cirrus : It is high altitude cloud. It has a hair like appearance. It is generally seen in clear day. Nimbus : The nimbus is most high altitude cloud. These cloud causes lightening, heavy rain and strong winds. --88--

Science Activity-2 1. Which are high and low clouds? 2. Which cloud makes Day-rainy day? Day-36 Activity-1 Weather forecasting : We have already studied that, by looking outside condition and looking in sky, we can say what type of weather is outside. We also can tell what type of weather is going to be happen also. Similarly scientists also study different factors like temperature, humidity, speed of wind etc. to predict the weather. You must have heard in TV and radio also about the whole Day-weather. The process of telling the weather by observing the atmospheric conditions of a place is called weather forecasting. Activity-2 1. Define weather forecasting. 2. How you know about weather daily? Day-37 Activity-1 Other ideas to forecast weather a. By burning something. : If we burn something that gives out smoke then we can say the direction of wind by seeing the direction of smoke. b. By seeing clouds : When we see lower clouds more in number, we can say it’s going to rain soon. Activity -2 1. Mention some local ideas to predict weather. Day-38 Activity-1 Structure of the earth : The earth is covered with land and water. Out of four parts, three part is covered with water and only one part is land. --89--

Class-5 The land part of the earth is not same everywhere. It is plain, slope, hilly and mountainous too. The water is found in river, seas, oceans and in form of ice in polar regions. Internal structure of the Earth : The internal structure of the earth is different from the external structure of the earth. The internal structure of the earth is classified into three layers: crust, mantle and core. Activity-2 1. State three layers of earth. Day-39 Activity-1 Crust : Crust is the outermost layer of the earth. It has different thickness. It is thicker at land areas and thinner at seas and water. It has thickness upto 10 km from earth’s surface. The crust is made of soil and rock particles. Mantle : Mantle is the middle layer of the earth’s internal structure. It lies between crust and the core. Its thickness is nearly 2900km. It is very high temperature. Core : The core is the innermost earth’s internal structure. The core is further divided into two parts: inner core and outer core. The outer core has thickness of 2000km. Iron and nickel is found in outer core in molten state due to very high temperature. The inner core has thickness of 1360km. Iron and nickel is found in inner core in solid state due to very high temperature. In the earth, as we go down and down, temperature goes on increasing. Activity-2 1. List the materials we find in crust mantle and core. Day-40 Activity-1 Changing surface of the earth : We already know that weather is changing Day-by day. Like weather, the surface of the earth is also changing. Changing weather is a fast process while changing surface of the earth is very slow process. --90--

Science Slow changes cannot be notified. But it is the fact that, the earth surface is changing. The rocks on the surface of the earth are cracking or breaking into smaller pieces Day-by day. The slow process of breaking of rocks into smaller pieces and then into soil is called weathering. Activity-2 1. Define weathering. Day-41 Activity-1 Causes of weathering 1. Rocks are broken down due to extreme heat of the Day-and cooling at night. 2. The cracking of rocks occurs also due to water. When the water passes inside the rock from small cracks, water gets freezes in cold places. During freezing, it pushes rocks from inside and bigger crack is formed. The cracks increases gradually and finally breaks the rocks into smaller pieces. 3. Moving water also breaks the rock When the moving water with solid particles dashes the rock continuously for longer period of time, the water erodes the rock. After continuously eroding, the water chips the rock and finally the rock is completely cracked. Activity-2 1. Write two factors of weathering. Day-42 Activity-1 4. Glacier also breaks the rock. The movement of glacier is slow but it cuts rock more effectively than moving water. 5. Wind also breaks the rock When the wind moves very fast along with the sand particles in it, the continuous hitting of sand grains to rocks causes the tearing of rocks. Slowly and slowly the rocks get weathered. --91--

Class-5 6. Animals and Plants Some plants grow in rocks makes tearing of rocks by forming chalky substance in the rock. Animals also forms tearing of rocks by pressing the rocks with their hooves. 7. Human Activities Human activities like road construction, mining, blasting etc. causes the breaking of rocks on earth’s surface. Activity -2 1. How animals and plants causes weathering? Day-43 Activity -1 1. When is the temperature maximum at day? 2. Is weathering a fast process? 3. Which instrument measures speed of wind? 4. The lower most cloud is called …………….. 5. The amount of water in air is called ……………. Activity -2 1. There are ………… types of clouds. 2. Draw a picture of rain gauge and anemometer. Day-44 Chapter: Personal Hygiene and Healthy Practice Activity-1 We should know good personal hygiene and good health behavior. Cleanliness is such a thing that makes you healthy as well as you look tidy and smart. You should start to keep healthy from this stage of life so that you will easily develop a habit of being healthy and smart. In future, you will be socially adaptable too. If you adopt a good personal hygiene then, in future not only you are healthy nut also help to prevent spreading disease too. --92--

Science Personal hygiene also includes cleanliness, balanced diet, rest and sleep, proper exercise and vaccination. Activity-2 1. Define personal hygiene. Day-45 Activity -1 Cleaning of body parts : Our body is made up of different parts and organs like head, hands, neck, eyes, teeth etc. During walking, running and playing games, our body also become dirty and contaminated with germs. Washing hands : Our hands are most movable parts of our body. We perform various activities by using hands. So, our hands become dirty or contaminated with germs very fast. Hence, we should wash our hands time to time and never forget to wash before having a meal. In many cases, our hands may get germs. While playing with friends, while touching anything, while playing toys or may be while playing with pets, our hand may be contaminated. If we eat food with contaminated hands we get several kind of disease like stomach ache, diarrhoea, dysentery etc. We should wash our hands after we go to toilet, after we touch dirty things etc. Activity-2 1. How do you clean your body? 2. What are the diseases caused if we do not clean the body? Day-46 Activity-1 Bathing : Our body performs different activities Day-by day. During these activities, our body sweats and become sticky. This sticky body attracts germs and dust. We should bath daily with lukewarm water. After bathing, our body should be dried with clean towel. During bathing, we should clean our nose and ears also. We should not insert hard objects inside ear during cleaning of ear.We should also clean our genitals and anus because they are covered most of time and they may stink due to sweats. --93--

Class-5 Activity-2 1. What type of water is used for bathing? 2. How you feel after bathing? Day-47 Activity-1 Taking care of our eyes Eyes are very important sense organs. We see this beautiful world through our eyes. So, we should take care of our eyes very properly. If our eye is not properly cleaned, we may loss our vision and may develop different disease in our eyes. We should also be very careful during the cleanliness of our eyes. We should protect our eyes from external injury also. Activity-2 1. What happens if you do not care your eyes? Day-48 Activity-1 Brushing teeth. We normally eat three to four times a day. We chew our food by our teeth. During chewing of food, different food particles may stuck in our teeth. These food particles get decay and causes bad smell and infection in gums. It may cause toothache in the future. We must brush our teeth daily. Brushing our teeth should be done in proper way. If we do not brush regularly, we suffer from bad smell, yellow teeth and plaque on the teeth. Activity -2 1. How many times you should brush the teeth in a day? Day-49 Activity-1 Care during menstruation Humans have different stages in their life. These stages changes with our age. After childhood we enter into puberty stage. --94--

Science Puberty stage is very important stage in our life. Different physical and psychological In girls life generally after 10/11 years of age, puberty starts. Puberty starts with menstruations. Menstruation is flow of blood from girls genital. It is very normal things for girls and women. Girls should not fear during menstruation. They should consult with their mother, elder sister and female teacher.During menstruation, the girls should clean the genital with clean water and sanitary pad should be used. Girls should eat nutritious and liquid food. Girls also should take rest. Activity -2 1. How girls should take care during menstruation? 2. Define menstruation. Day-50 Activity-1 Physical exercise Physical exercise means movement of body parts or organs to keep a person healthy. Physical activity is very simple and important in our daily life. Physical exercise helps to keep the body healthy and strong. Physical exercise increase our appetite and develops strength. Physical exercise also prevents us from different communicable and non- communicable disease. Physical exercise also increases your ability and confidents. Activity -2 1. What is physical exercise? 2. Write two advantages of physical exercise. Day-51 Activity-1 Rest and sleep : Rest and sleep are important things in our daily life. If we do not take rest or sleep, we cannot perform our daily activities effectively. When our body gets tired, we should take rest or sleep. Normally we should sleep for 8 hours daily. Small children and old people should sleep for more than 8 hours. For better sleep : For better sleep following conditions are to be maintained: --95--

Class-5 a) We should sleep properly. b) We should sleep for 8 hours. c) Our room should be quiet and ventilated. d) We should not cover our face while sleeping. Rest and sleep helps in digestion of foods, boost memory and refreshes our body. Activity-2 1. Why we should take rest and sleep? 2. Write advantages of sleep. Day-52 Chapter: Waste and Environmental Sanitation Activity-1 We have different things in our houses. Some are useful things and some are useless things. We use useful things while we do not use useless things. We try to throw out useless things. Those things which are useless and we intend to throw are wastes. Our daily life activities give rise to number of wastes. Like from our kitchen, from our working spaces etc. Wastes may be solid, liquid or gas. Solid wastes Solid wastes are of two types: a. Biodegradable wastes b. Non-biodegradable wastes. Activity-2 2. Define a waste. 1. Name types of solid wastes. Day-53 Activity-1 Biodegradable wastes : Those wastes which decays in soil are called biodegradable wastes. Kitchen wastes like weeds, leaves, animal and plant’s parts are common solid biodegradable wastes. The above mentioned are biodegradable wastes as they decay easily in soil. Bio degradable wastes generally come from organic materials like plants and animals. --96--

We can make manure from biodegradable wastes. This manure can be used in our kitchen garden.This type of compost manure is also called organic fertilizer which we can re-use in kitchen garden or can sell it and earn money. Organic or biodegradable wastes should not throw here and there because it decays and may give foul smell in the environment. If you cannot make manure then, you can give this waste to municipality vehicle. Activity-2 1. What are biodegradable wastes? Give examples. Day-54 Activity -1 Non Biodegradable wastes : Those wastes which do not decay are called non biodegradable wastes. These type of wastes are called inorganic wastes too as they are not obtained from organic materials. Plastic, glass, iron pieces etc. are non biodegradable wastes. These wastes do not decay. We can manage non-biodegradable wastes by applying some methods of waste management. The methods of waste management are reuse, recycle and reduce. Activity-2 1. What are biodegradable wastes. Give examples. Day-55 Activity-1 Environmental Sanitation :The place where we live is called environment. Environment consists of living and nonliving thing. Different trees, forests, houses, rivers, different animals, streets and everything in the surrounding is environment. Due to various human activities, our environment is being degraded Day-by day. Burning of wastes and fuel, throwing wastes here and there is causing air pollution in our environment. Not only air, our whole environment is being polluted Day-by day. The activities which improves or maintains the condition of environment is called environmental sanitation. --97--

Class-5 Activity-2 1. Define environment. Day-56 Activity-1 Measure to maintain Environmental Sanitation : We can maintain environmental sanitation by applying following steps and measures: a) Safe water supply. c) Proper disposal of household b) Fixed number of houses in a wastes. locality. d) Plant trees in the community. e) Safe industrial waste disposal. Activity-2 1. Write four measure to maintain environmental sanitation. Day-57 Chapter: Food for healthy living Activity-2 We eat food every day. We cannot survive without food. The food we eat helps us to grow our body, keep healthy and gives energy. Children love sweet and junk foods nowadays. Not only children, today’s youth are also loving fries and oily food. We can find some people who are meat lovers too. The above habits are bad food habits. We should not have such bad habits. We should eat different types of food which is mixture of foods from plants and animals. We mostly eat rice, dal, vegetables, milk and different drinks. These type of habit is good food habit and good for our health too. Activity -2 1. What are good and bad food habits? --98--

Day-58 Activity-1 The food which we eat daily may not be balanced diet, so we must take care of balanced diet food also. Balanced diet is a mixture of different kind of food that supplies all essential nutrients for our body. Balanced diet includes all varieties of food and drinks. The goal of balanced diet is to eat different types of nutrients we need for our healthy body. A balanced diet contains right proportions of food from different food groups; like carbohydrates, proteins, fats, vitamins, minerals etc. Activity-2 1. Define balanced diet. 2. Name different food groups. Day-59 Activity-1 Carbohydrates : Cereals like rice, wheat, maize, corn millet, potato, etc. foods contain carbohydrates. We get energy from taking carbohydrates. We make various foods daily which are rich in carbohydrates. E.g. cooked rice, noodles, bread, pizza, cakes, pastas etc. These are main foods for us. These main foods are also called staple food. Our staple food is rice and roti. In Himalayan region people have potato and buckwheat as staple food. Activity-2 1. Give examples of food that provides us carbohydrate. 2. Define staple food. --99--

Class-5 Day-60 Activity-1 Protein : Protein is obtained from animal sources as well as plant sources. Animal sources of protein are meat, fish, eggs and Plant sources of protein are peas, beans, nuts etc. Protein is essential for growth and repair of our body cells and tissues. We should add protein in our daily meal in small quantity. Activity -2 1. From which foods we get protein? 2. Why is protein needed for our body? --100--