SCIENCE IV

3. The second stage in the life cycle of a frog is the _____. i. young adult j. egg k. tadpole l. adult4. A caterpillar is the _______ stage in the life cycle of a butterfly. m. 1st n. 2nd o. 3rd p. 4th5. This is the stage wherein the butterfly starts to develop its wings. q. egg r. pupa s. caterpillar t. adultC. Outside each circle is a word corresponding to a stage of development of a mosquito. Draw how the mosquito looks like in each stage. Copy and answer in your notebook. eggadult wriggler pupa

D. Describe each of the stages in the life cycle of a fly. Do it in your notebook. Congratulations for your efforts with this module. Share your experiences and learnings with your classmates or friends.

GRADE 1V METHODS OF HEAT TRANSFERAt the end of the module, you should be able to: Prove that heat travels by conduction from hot to cool object. Prove that heat travels by convection through liquid and gas. Infer that heat travels by radiation through gas. Try to RecallWalk under the sun for five minutes. Why do you feel warm when you walk under the sun? How do you think the heat from the sun reaches the earth? ExploreActivity 1Perform the following activities.1. Prepare a candle, a small piece of cloth, spoon, and matches.2. Light the candle. With a piece of cloth hold a spoon over the flame for five

minutes.3. Observe what happens to the handle of the spoon.Activity 21. Prepare a glass jar, water, blue dye, and matches Get a pyrex glass jar. Fill half of it with water. Put a pinch of blue dye in the water. Heat the water over slow fire on a stove. Observe what happens. Describe the movement of the blue dye when the water starts to boil.Activity 3Sit near a fire. Feel your face and arms. How do you feel? How did the heat from thefire transfer to you?Read and learn more:

The particles or molecules of the substances in a solid are very close toeach other. As the molecules in one part of a solid are heated, the heat travels tothe nearest object. These molecules in turn transfer the heat to the nextmolecules. This process is called conduction. During heating, the water at the bottom part of the jar gets heated first.When water is heated, it begins to rise. Cold water is heavier than warm water.As warm water rises, cold water goes down. The process is repeated until all thewater has the same temperature. The same method of heat transfer also takesplace in the air. This process is called convection. The heat from the fire travels by waves through space to your body. Yourbody absorbs the heat so it becomes warm. This process is called radiation. I learned that:  heat transfers from a hot body to a cold body.  heat travels in solids, liquids and in gases .  conduction is the transfer of heat from molecule to molecule in an object.  convection is the transfer of heat by currents.  heat travels by convection in liquids and gases.  radiation is the transfer of heat through space.

Apply ItDo the following activities.1. Burn a piece of crumpled paper in a stove. Stand near the stove fire. Do you feel the heat coming from the fire? Infer how heat is transferred from the burning paper to you. What is this method of heat transfer called?2. Leave a fork in a bowl of hot water. Use a tong to get the fork soaked in hot water. Hold the fork. Observe what happens to the fork. How will the heat travel in the fork? What do you call this method of heat transfer?3. At noon time, the hot surface of the ground heats the air above it. The air becomes warm. What is this method of heat transfer called? Test YourselfA. Read and study the situation below. Identify the method of heat transfer described. Write conduction, convection, or radiation in your notebook. 1. Melissa is frying fish. 2. A spoon is left in a bowl of hot soup. The spoon gets hot. 3. Larry feels his head and arms getting warm as he walks under the sun. 4. A girl holding a hot spoon felt her fingers becoming warm. 5. The hot surface of the land heats the air above it. The air becomes warm.B. Explain how heat travels from the fire to a frying pan to the cooking oil, to the fish being cooked.

GRADE 1VNUTRITIONAL VALUE INFORMATION IN FOOD LABELS At the end of the lesson, you will be able to:  identify the ingredients with or without nutritional value of food products Try to RecallCan you still remember the three basic food groups?Try this. A. Complete the concept map. G___________ foods help build and repair theG ___________ foods tissues and cells of theprovide energy for the body.body. Basic Food Groups G___________ foods help regulate body processes.B. Select from the box below food samples for each of the following nutrients:

a. carbohydrates ________________________ ________________________ ________________________b. fats ________________________c. proteins ________________________ ________________________ ________________________ ________________________ ________________________d. vitamins and minerals ________________________ ________________________ ________________________squash rice banana cue boiled cornpandesal papaya butter margarineoil cheese kangkong eggsfish daing meat beansC. Copy the table on your notebook and fill it up.

Meatltime Food I ate Nutrients I got BreakfastSnack/Recess LunchSupper/DinnerExploreNow make a survey of the other food that you are eating using the product label.Activity 1. Studying Product Labels Get a product label of the following:cornik prawn crackers chipsfruit juice soy sauce candymargarine sugar candy soft drinkssardines coffee chocolatemayonnaise cup cake Read the product label and look at its contents. Check which among the contents have nutritional value.

Food Product Nutrients Has Label Present Carbohydrates Nutritive value No nutritive value1. cup cake √READ AND LEARN MORE  Food labeling is a requirement in food products.  Carbohydrates provide a great part of energy in human diets. It is the most abundant and cheapest.  Vegetables and fruits are a direct source of many minerals and vitamins.  Proteins build body tissue and regulates body processes.  Minerals are required in the structural composition of hard and soft body tissues.  Minerals needed by the body include calcium, phosphorous, magnesium, iron, iodine and potassium, copper and zinc.  Calcium is needed for bone development.  Phosphorous is present in milk.  Iron is needed to form hemoglobin which is the pigment in red blood cells responsible for transporting oxygen.  Vitamin A is essential for the normal growth and good eyesight.  Calories - amount of energy from food.

Apply It A. 1. What kind of snack is best to buy and eat during recess time? 2. What will happen to you if you do not eat the right kind and right amount of food? B. Write YES if the food has nutritive value and NO if it has no nutritive value. If yes, name the nutrients present. ____, ____ 1. Monosodium glutamate (MSG or vetsin) ____, ____ 2. coffee ____, ____ 3. puto ____, ____ 4. cotton candy ____, ____ 5. boiled egg Test Yourself* Sing the “Bahay-Kubo”. List on your notebook the foods in the song and identifywhether it has nutritive value or no nutritive value. If it has nutritive value, name thenutrients present (carbohydrates, protein, fats, vitamins, minerals).



GRADE 1V INFORMATION IN PRODUCT LABELS At the end of the module, you should be able to:  Identify the information in product labels of household materials  Describe the contents of product labels Try to Recall Copy the table below in your notebook. Then fill it with the names of different itemsfound in your house. List the items according to their beginning letter. Classify each itemaccording to it’s use as medicine, food, cleaning, or product for personal care. Item Use A B C D E F G H I J K L M N O P Q R S T U V W X Y

Z Explore Have you ever accompanied your mother and father to the market or mall to buysomethings that your family needed? Perhaps you noticed them reading the labels orcontainers of the products being sold? What information could they have been lookingfor? In this activity you will familiarize yourself with the different information containedin product labels.Activity 1. Reading Product LabelsLast Sunday, Aling Auring went to the market and bought the following products sardines vinegar bleaching soap corned beef muriatic acid tocino facial cleanser detergents paracetamol curls noodles candy potato chips juice alcohol fertilizers vitamins

Take a look at the labels of some of these products.Canned Cola DrinksContainscarbonated water, caramelcolor, sweeteners,aspartame and food acids,sodium, citrate,preservativesNutrition factsCalories 138Total fat 0Total carbohydrates 0Protein 0 Potato Chips Ingredients: Dehydrated potatoes, vegetable oil, sugar, potato starch, citric acid, antioxidant, pepper Nutrition Facts Calories 110 Fat 12% Cholesterol 20% Sodium 0% Carbohydrates 6% Dietry Fiber 4% Vitamin A 0% Vitamin C 0%

NoodlesIngredients:Wheat flour, iodized salt,tartrazine flavor enhancerNutrition FactsKilo calories 120ProteinBig’s Sardines Big’s Sardines Fortified withNutritional information Vitamin AEnergy -------- 60 KcalFats ------------ 7% Ingredients:Sodium -------- 260 mgCarbohydrates – 9% tuna flakesProtein --------- 4% water soy protein concentrate sugar soya oil venigar starch Iodized salt Seasonings

Orange JuiceIngredients:Water, orange juice, sugar, citricacid, ascorbic acid, betacaroteneNutrition FactsCalories 100Fat 0Cholesterol 0Sodium 0Vitamin CCalcium 100% 20%B-1Niacin 4%Vitamin E 2% 1% Insect spray killer * kills mosquitoes and other insects Warning: - Keep away from fire. - Store properly. - Keep away from children. Manufactured by: KYX Manufacturing Corporation

Nele whitening facial cleanser Effectively cleanses for white skin. It removes dirt and excess oils to help protect skin from pimples. Direction: Moisten a piece of cotton and apply on face. External use only A product of EBU Company Glue Uses: Bonds must be porous materials. To open/close: Twist cap to open. Always close up tightly and store upright. Warning: Keep from fArefetezrinlogo.king at the labels, what important information do you know about the product? Which ones are dangerous? Why?

Complete the blockbuster to decode the word about informations found in food labels.Write your answer in your notebook.1. I g e t2. N t r t n a ts3. E x r nD e4. W ni ig s5. U e s  Look at the product labels again.  Write on your notebook the statement that gives a correct observation about the labels. ______ 1. It provides information on the nutritional value of food. ______ 2. The date seen on the labels tells us when it is being manufactured and when it will expire. ______ 3. The content allows us to choose. ______ 4. It provides us minimal cost. ______ 5. It gives us a hint how food is to be served and prepared. ______ 6. It warms us from being harmed. ______ 7. It informs us on the elements of the product. ______ 8. It makes us worry and scared. ______ 9. It allows us to select the kind of product we want to buy.Activity 2. Identifying Household Materials Through Product Labels  Look for 5 products used in your kitchen.  Try to identify and describe the contents of each products.

READ AND LEARN MORE  Food labeling - is a method of informing the costumers about the contents of the food product. It shows how it is to be served and prepared and what ingredients and additives are present.  The description of the contents must be truthful, accurate and not must be misleading.  The amount of each nutrient must be shown per serving.  Drug labeling - is the information about the drugs.  They are clearly and correctly labeled to provide high degree of costumer protection on its usage.  The label must clearly state the product name and contain details of the ingredients, including the amount of active components and any other ingredients known to have side effect or action.  Warnings especially on products that are poisonous or can cause health risks should also be seen on the labels. Apply It Write a letter to your classmate or cousin informing him/her on what to do whenbuying products like food, medicines and pesticides.

Test Yourself*TRUE or FALSE: Write TRUE if the statement is correct and FALSE if it wrong._____1. Medicines have warnings on their labels._____2. The name of the manufacturing company is seen on the products._____3. Some junk foods that do not have information on the labels are nutritious._____4. The nutritional value on food packaging should be exact and correct._____5. Buying materials without reading the product labels is a good practice._____6. Product labels include the expiration date._____7. When products are expired they can still be used._____8. Warnings are seen on labels for us not to buy them anymore._____9. It is advisable to read the product labels before buying them._____10. Follow the instruction when using poisonous materials.

SEED GERMINATIONAt the end of the module, you should be able to: Observe the changes in germinating seeds until the seedling stage Try to Recall 1. Copy the illustration below in your notebook then label the parts of the seed. 2. Complete each sentence. Write the missing words in your notebook. 1. A seed is covered by its ___________. 2. The food of a young plant is found in the ___________ of the seed. 3. ________________ are seeds with two cotyledons. 4. A seed with one cotyledon is called ______________. 5. Seeds grow into a ____________. 6. The __________ is the seed part that gets water and minerals from the soil.

ExploreYou are to perform an activity on how to germinate a mongo seed. 1. Prepare the following - 20 mongo seeds - one big wide-mouthed transparent bottle - 1 tin can of loam soil - 3 pieces medium size charcoal - can of water - ruler - cardboard 2. Position the cardboard cylinder at the center of the bottle. 3. Put pieces of charcoal at the base of the cardboard cylinder. 4. Put some soil into the bottle and around the cylinder. 5. With a stick, evenly distribute the seeds along the inner sides of the bottle. Make sure the seeds can be seen from the outside. 6. Pouring enough water to the cylinder. Check that the seeds are not disturbed. The water level should not be higher than the level of charcoal when it settles. 7. Observe the seeds every day. 8. Note all changes that you observe in the seeds. Write these in your notebook.

1. What comes out after the seed coat breaks? 2. What parts of the plant grow when the roots appear? 3. When do we know that the seeds are germinating? 4. Describe the changes that take place when the seed grows into a new plant.Read and learn more At first, the mongo seeds look like the mongo seeds that we eat. Aftersome days, the seed coat breaks and a new root begins to grow. Almost at thesame time the stem and the leaves begin to grow upward. This shows that theseeds are germinating. More roots will develop and more leaves will come out ifthey have enough water, air, light and good soil. (Illustration of a germinating mongo seed)I have learned that:several changes take place in seeds during the process of germination. Following arethe changes:  Roots begin to grow as the seed coat breaks.  The stems and leaves appear after several days.  More roots develop and more leaves come out as the days pass.  The stem becomes longer.  The new plant emerges.

Apply It1. Arrange the illustrations below according to the correct sequence in the process of germination. Write only the letters in your notebook. AD C DE2. You soaked some mongo seeds. After four days, you see your younger brother about to pluck the stems. What will you do? Why?

Test YourselfAnswer each question below. Write only the letter of the answer in yournotebook.1. When the seed coat breaks and roots appear from a seed, what process is taking place in the seed? a. fertilization b. self-pollination c. germination d. cross-pollination2. During germination, which part of the new plant comes out first? a. new plant b. roots c. seed coat d. cotyledon3. As germination continues, what happens to the leaves? a. They grow in number. b. They wilt. c. They remain the same in number. d. They grow smaller.4. As the new plant grows into a young plant, what happens to its stem? a. It grows smaller. b. It grows taller and greener. c. It remains the same in length. d. It becomes shorter.5. What happens before the entire plant comes out? a. The cotyledons wilt. b. The seed coat breaks. c. The leaves come out. d. More roots grow.



GRADE 1V PARTS OF A SEEDAt the end of the module, you should be able to: identify the parts of a seed infer the function of each seed Try to Recall Activity 1 A. Get a gumamela flower. Study its structure. Identify which part is described. Draw your answer in your notebook. 1. The stigma is stalk-like structure in the center of the flower. 2. Pistil is the female reproductive part of a flower. In most flower, the pistil works like a vase with a long neck. 3. At the bottom of the pistil is a swollen structure called the ovary. 4. The ovary holds the ovules, the structure that contains the female reproductive cells. 5. The long slender stalk is the style. It holds the stigma. 6. The stigma is often sticky to aid in pollution. 7. The male reproductive part of a flower is the stamen. It has a stalk called filament and round structures at the top called anthers where pollen grains grow. 8. Sepals is the green leaf-like structures at the base of the flower before it blooms. B. Study the illustration of a gumamela flower below. Label its parts.

Activity 2 Study the illustration. Arrange them according to the stages on how seeds are formed. Draw them in your notebook. EExxpplloorreation TimeActivity 11. Prepare bean seeds and a hand lens2. Soak the seeds in water overnight.3. The next day, remove the skin of the seeds.4. Split the seeds open.5. Look at each bean using the hand lens.6. Draw what you saw under the hand lens in your notebook.7. Count the parts of a seed.8. Guess the name of each part of the seed.9. Write your guesses in your notebook.

Compare your drawing and guesses with those below.embryo plumulecotyledon hypocotylseed coat radicleRead and Learn More A seed has an outer covering called the seed coat. The seed coat protects the seed from injury. Inside the seed coat is a young plant called embryo. On each of its sides is a part called cotyledon. The cotyledons store food for the young plant. The embryo is made of a plumule, which is the first leaf, the hypocotyl, which will become the root stem, and the radical, which will become the primary root of a dicot seed. plumulehypocotyl embryocotyledon radicle seed coat As you examine a seed, notice that some of them have two cotyledons.Cotyledon serves as food for the young plant. As the seedling grows, it uses upthe stored food in the cotyledon. When the leaves have completely emerged, thecotyledons dry up. A dicot seed has two cotyledons, like corn and papaya while amonocot seed has one cotyledon the rice and wheat. Rice and wheat have onecotyledon too. They are called monocotyledon or monocots.

I learned that:  is made up of these parts: seed coat, embryo, and cotyledon.  the embryo is made up of the plumule, hypocotyl and radicle.  the cotyledons provide food for the young plant.  the protective covering of the seed is the seed coat.  seeds with two cotyledons are called dicots.  seeds with only one cotyledon are called monocots. Apply ItACTIVITY 11. Collect at least five seeds.2. Try to open each seed.3. Draw in your notebook. Label its parts.4. Identify whether a seed is a dicot or monocot.ACTIVITY 21. Some children collect seeds just for fun. Do you think this is good? Why?2. What useful materials or objects can you make out from seeds?Test YourselfA. Complete each sentence below with the correct word or words. Choose the answer from given options. Write only the letter of the answer in your notebook.1. A seed is protected from injury by its outer covering called ______. seed coat  radicle cotyledon  plumule2. The young plant inside the seed will grow into a new plant because of the food provided by the ________.

 seed coat  roots cotyledon  stem3. As the young plant inside the seed grows into a new plant, its radicle will become the ________. rootlets  leaves main roots  seed coat4. The roots are very important for the new plant because __________. they protect the new plant they help the new plant get out from the soil they absorb water and mineral from the soil they help in the germination process5. The biggest part of the seed is the ____________. seed coat  young plant cotyledon  rootsB. Label the parts of the seed below. Write the answers in your notebook.C. Answer each question below. Write the answers in your notebook. 1. What do you think mango, santol, and avocado seeds have in common? 2. How do cotyledons help the new plant? 3. What do you call a seed with one cotyledon? 4. What do you call the tiny new plant? 5. What do you call the outer covering of a seed?



POLLINATION AND FERTILIZATIONAt the end of the module, youshould be able to Explain the role of pollination in plant reproduction Explain the role of fertilization in plant propagation Try to RecallA. Arrange the pictures below to show the correct sequence of the stages in the germination of a seed. Wrie the numbers in your notebook.__4___ __1___ ___3__ __5___ __2___B. Describe the changes in a germinating seed. Write the answers in your notebook.

Exploration Time Have you ever observed plants with flowers in your garden? Do you knowthe importance of flowers to plants? In the succeeding activities, you will learnhow plants reproduce.Activity 11. Prepare a hand lens and a gumamela or a bougainvillea flower.2. Study the parts of a flower in the illustration below.3. Using the hand lens, observe the pistil and the stamen of a gumamela or a bougainvillea flower.4. Open the ovary. Look for the ovules.5. Touch the anther. Observe thetips of your fingers.6. Answer the following questions. Write the answers in your notebook. a. What did you notice inside the ovary? What are these? What is their function? b. When you touched the anther, what did you notice on the tip of your fingers? What are these? What is their function?

Activity 2Get a real gumamela or bougainvillea flower. Dissect the flower and compare itwith the illustration below.Answer these questions in your notebook:  What happens when the male nucleus joins the female nucleus in the ovary? What will happen with the ovules? What will happen with the ovary?  If the male nucleus will not reach the ovary, will there be fertilization? Why?  What do you think will happen if fertilization will not take place?

Activity 31. Study the life cycle of a flowering plant from seed to seed stage.Answer the following questions in your notebook.  If the flower will not be pollinated, will there be seeds? Why?  What is the importance of pollination to plant reproduction?  Describe the life cycle of a flowering plant from and how can it be developed into fruits and seeds.Read and Learn More: Pollination is the transfer of pollen grains from the stamen to thepistil of the flower. Most pollination is carried out by insects, birds andthe wind. The two methods of pollination are cross-pollination and self-pollination. Cross-pollination is the transfer of pollen grains from thestamen of one flower to the pistil of a flower of another plant. Self-pollination is the transfer of pollen grains from the stamen of one flowerto the pistil of the same flower or of another flower on the same plant. A flowering plant can reproduce sexually because it has a stamenand a pistil. The stamen (male part) holds the pollen grains. Pollengrains are powdery materials. These are needed to fertilize the ovules(eggs). The pistil (female part) is shaped like a vase, the long, narrowtube- like part is the style. Notice that the style is connected to the ovary.Inside the ovary the ovules. The pollen grains drop on stigma and produce a tube likestructure called a pollen tube. This pollen tube extends down the styleand into the ovary with the ovules which later form into seeds through thecomplete process of fertilization. Ovules and pollen grains contain thesex cells of flowers needed for reproduction.

Fertilization will take place when a male nucleus in the pollen tubejoins the female nucleus of the ovule. The ovule will develop into a seedafter fertilization. Pollination is the transfer of pollen grains from the anther to thestigma of a flower.I learned that:  Pollination is the transfer of pollen grains from (male) anther to the stigma of the flower. The pollen grains can come from the same flower or another flower.  There are two kinds of pollination: cross-pollination and self- pollination.  Fertilization takes place when a male nucleus in the pollen tube joins the female nucleus in the ovule. Apply ItWrite your answers in your notebook.A. Why do flowers have attractive and colorful petals?B. What do you think will happen to the plant if pollination and fertilization will not take place?

Test YourselfA. Read each statement below. In your notebook write true if the statement is correct. Write false if it is not.Then write word/s that would make the statement true. Example: false (attractive) 1. Flowers have dull petals. 1. The stamen is the female part of a flower. 2. Ovules are found inside the ovary. 3. Pollination is the transfer of pollen from the anther to the stigma. 4. Pollen tube is produce when pollen grain drops to the anther. 5. Fertilization takes place when male nucleus joins the female nucleus of he ovule.B. Explain the importance of pollination and fertilization to plant reproduction and propagation. Write the answer in your notebook. Congratulations! What a job well done, keep it up.

GRADE 1V PREVENTION OF SOIL EROSIONAt the end of the module, you should be able to demonstrate how people and plants help prevent soil erosion Try to RecallA. Copy the table below in your notebook. Then complete it with words from the following. Write the words in the correct column. illegal logging burning of trees overflowing of rivers strong winds landslides barren soil mining uprooting of trees destruction of roads loss of top soil exposure of bed rocks digging of the soil Causes Effects1. 1.2. 2.3. 3.4. 4.5. 5.6. 6.

Explore1. Prepare two pans or basins of the same size, soil, and water.2. Build a “hill” of soil on each pan or basin.3. Cover one hill with grass. Tamp the grass firmly so that it will stick to the soil.4. Sprinkle water over each hill. Observe the soil as the water flows downhill.5. Answer the following questions. Write the answers in your notebook. a. What happened to the soil in the two pans or basins? b. Which pan or basin has more soil left? c. What prevented the soil from being washed away?6. Write your observations on how plants prevent soil erosion.

B. Study each illustration below. Identify the method on preventing soil erosion as depicted in the illustration. Write the answers in your notebook.1. 2.3. 4.

Read and Learn More: Preventing Soil Erosion Soil erosion can be prevented with the application of several methods. Plants and trees help control soil erosion, beside a watershed. Rainwatercannot wash away much soil when it falls on plants. The roots of the plants holdto be soil in place. Trees are being cut down for many reasons. Soil erosion canbe prevented when reforestation is done. This is the planting of young trees toreplace trees that have been cut down or burned. Strip cropping is another way of conserving soil. Plants are arranged instrips of alternate bands or row crops and cover crops. The cover crops hold thesoil and reduce water run-off. Example is planting crops and grasses alternately.Grasses prevent the soil from going downhill.

Building dikes of stones or logs may be used to slow down water as wellas prevent water from flowing out. The dikes prevent soil from being washedaway by rain. When the rain falls, the rainwater flowing downhill carries a large amountof topsoil. One way to prevent this is through contour plowing. Here, the land isplowed around the hills instead of up and down. Running water is prevented andcannot flow easily.

Terracing is another method to prevent soil erosion. Terraces are flatareas built on the mountain sides. Since it is flat, it prevents soil from going downeasily. Unlike if it has slopes wherein water and soil can flow down easily.These terraces are then planted with rice and other crops. The Banawe RiceTerraces is a famous example of the terracing method. Planting rows of trees or bushes is another way of preventing soil erosion.These plants act like fences or walls. They block the force of the wind. Thesetrees are called windbreak. The soil will not be easily carried away by the wind.

1. What are the different methods of preventing soil erosion?2. Discuss each method.3. Which method is applicable to flat lands?4. Which method is applicable to hills or mountains?I learned that: erosion is the washing away of soil. there are ways of preventing soil erosion like:contour plowing reforestationterracing tree wind breakstrip cropping dikes Apply ItA. Go around your community. Observe the ways people use to prevent soil erosion. Write/Describe how these prevent soil erosion. Write your description in your notebook.B. Study each situation below then answer the questions. Write only the letter of the answer in your notebook. 1. It is your job to sweep your home yard. Loose particles of soil are carried away as you sweep. Much topsoil is lost this way. What can you do to solve the problem? a. Sweep only the litter. b. Let grass grow on the ground. c. Let the dry leaves rot and cover the soil. 2. Your community will be conducting a “Plant A Tree” campaign. Will you participate in the campaign? Why? a. To friends from people involved in the campaign b. To beautify the community and conserve the soil in the area. c. To be recognized by barangay officials

Test YourselfA. Answer each question below. Write only the letter of the answer in your notebook. 1. What is erosion? a. It is the washing away of soil. b. It is the replanting of crops. c. It is the cutting down of trees. 2. Why is grass considered an important plant cover? a. It holds soil in place. b. It grows easily. c. It makes a place look green. 3. What is reforestation? a. It is the planting of crops alternately to hold water. b. It is the planting of more trees to block the wind. c. It is the planting of new trees. 4. What is the best way to prevent soil erosion? a. Plant trees b. Cut down trees c. Construct a wall around denuded forests 5. Where is terracing most useful? a. on mountain sides b. near river banks c. on plains 6. What should be done to prevent soil erosion on plains? a. Build dikes around them. b. Plant trees in them. c. Build contours around them.

7. Which method best prevents soil erosion on high and steep mountains? a. contour plowing b. terracing c. building dikesB. Come along on a treasure hunt! Just follow the map to a treasure below. However, on the way you will encounter many problems caused by soil erosion and these will stop you by continuing on your quest. You can only move forward by thinking of methods or ways to solve each problem.

GRADE 1V REVOLUTION OF THE EARTHAt the end of the module, you should be able to: Explain the Earth around the Sun.Try to RecallA. Copy the puzzle below, then in your notebook complete it. Refer to clues to guide you. (4) (5) A (1) N (6) (2) (3) T NACROSS DOWN1. It happens when one side of the earth 4. It happens when one side of the earth is away from the sun. is facing the sun.2. Shape of the earth 5. An imaginary line which runs3. It is the turning of the earth on its through the center of the planet between the North and South poles. axis. 6. A place where the people, animals and plants live.

B. Fill in each blank with the correct answer. 1. Earth rotates on its ______. 2. At any time, one part of Earth is in darkness while the other part experience ______. 3. Earth spins once every _____ hours. 4. Earth gets its _____ from the sun. ExploreACTIVITY 1 Place any objects for example a chair, at the center of a room. Draw a circular path around the object. The circular path should be 1 ½ meters away from the chair. Mark a place on the circular path. Stand on that place.