Gulf Asian English School, Sharjah Science Chapter-4 Human Body, PDF

Gulf Asian English School, Sharjah SCIENCE CHAPTER-4 HUMAN BODY: A LIVING WONDER Name: Class: 3…… Roll No - Learning objectives: T...

Gulf Asian English School, Sharjah SCIENCE CHAPTER-4 HUMAN BODY: A LIVING WONDER Name: Class: 3…… Roll No - Learning objectives: To identify the organs in the different organ systems of a human body. To describe the function of different organ systems. I. Choose the correct answer: 1. Which of the following organs belong to the respiratory system? a. b. c. d. 2. Sameer uses dumbbells to exercise. Which body systems are involved in bending and straightening of arms? a. Muscular and excretory systems b. Digestive and nervous systems c. Muscular and skeletal systems d. Skeletal and reproductive systems 3. Our brain is protected by; a. Ribcage b. Skull c. Arm muscles d. Back bone 4. An organ X is a part of the nervous system. It is a thread like organ that carries messages from our sense organs to the brain. Which of the following is X? a. Blood vessel b. Food pipe c. Nerve d. Muscle 5. Which organ system does the following organ belong to? a. Circulatory b. Respiratory c. Digestive d. Muscular 6. Which of the following systems is responsible for body movement? a. Respiratory b. Reproductive c. Digestive d. Muscular 7. The thin tubes that carry blood from the heart to all organs of the body; a. Blood vessels b. Bones c. Muscles d. Nerves II. Answer the following questions 1. Define organ system: An organ system is a group of organs that work together to perform one action. 2. Name the organ systems the following organs belong to. Ki Excretory system Respiratory system Circulatory system Nervous system 3. Complete the given table. Organ system Functions Organs Skeletal system It gives shape and support to our Bones and joints body. Muscular system It helps in the movement of our Muscles body together with bones. Digestive system Mouth, food pipe, It helps in the digestion of food. stomach, small intestine, large intestine and anus Circulatory system It carries blood and nutrients to all parts of our body. Heart pumps heart and blood vessels blood which is carried to all the organs by blood vessels. Respiratory system It helps in breathing. Nose, larynx, windpipe and lungs Excretory system It helps in removing waste material kidney from our body through skin(sweat) and urethra(urine). Nervous system It helps in passing information from Brain, spinal cord and one part to another part of our body. nerves 4. Priya’s parents advised her to stop eating in a hurry and chew in a mindful manner. Why did Priya’s mother advise her to do so? Ans. Chewing is essential for proper digestion and it also can stuck in the throat result choking. 5. Observe the given diagram and answer the following. Identify the given organ system -Circulatory system P How will our body be affected if organ P is removed? Ans. Blood flow becomes impossible and cause immediate death. Success criteria I did it I tried it I need to work upon To identify the major organs in organ systems of a human body. To describe the function of different organ systems.  GULF ASIAN ENGLISH SCHOOL, SHARJAH Science Worksheet, 2024-25 ANSWERKEY TOPIC: Food and feeding habits in animals Name:______________ Grade: 3_____ Date:_________ Learning objectives:  To classify the animals based on their eating habits  To describe the feeding habits of animals LEVEL 1: 1. Match the animal with the way they eat the food: Gnawing the food Tear the flesh Sucks the blood Chewing the cud 2. Which of the following types of teeth in herbivores with correct description. a) Have strong flat and broad front teeth to bite off leaves. b) Have strong back teeth which help them to chew the food. c) Sharp front teeth which help them to bite nuts and seeds. LEVEL 2 1. Identify the feeding habits of animals according to the given picture. a) b) c) Tear the flesh Chewing the cud Gnawing the food 2. A camel lives in the desert while a polar bear lives in ice –cold regions. Do they have different eating habits? Ans. Yes, camel is a herbivore that eat plants whereas the polar bear is a carnivore that eat flesh. LEVEL 3 1. Observe the given diagram and answer the following question. Here, X = animals whose primary food source is plant. Y X Z Y = animals that eat other animals Z deer crow wolf Z = animals which eat both plants and animals zebra What could be Z? a) Crow b)deer c)wolf d)zebra 2. Look at the pictures of the two animals and observe their food and feeding habits. Answer the questions given below. a) Compare the feeding habit of a cow and lion. Give two differences between them. Ans. Cow is a herbivore that has broad, flat, strong back teeth to chew the cud whereas the lion is a carnivore that have sharp, pointed, curved front teeth to tear the flesh. b) Give a reason to justify the strong back teeth of a cow. Ans. Strong back teeth of a cow helps them to chew the cud. They swallow food without chewing. Later, they bring it back into their mouth for chewing and chew it well for hours is called chewing the cud. Success Criteria I did it I tried it I need to work upon  To classify the animals based on their eating habits  To describe the feeding habits of animals  Gulf Asian English School, Sharjah SCIENCE WORKSHEET ANSWERKEY Chapter -9 SOLIDS, LIQUIDS AND GASES Name: ………………………... Class: 3 Sec ……. Roll No - ………… Learning Objective: To compare the properties of solids, liquids and gases. To define condensation, evaporation, freezing and melting. LEVEL-1 Choose the correct answer: 1. Radhika’s mother kept one bowl of ice-cream in the refrigerator. Suddenly there was a power failure and she noted the ice cream changed into liquid after some time. How does it become liquid? a. Sweet milk freezes into liquid ice cream b. Ice cream evaporates into liquid c. Ice cream condenses and becomes liquid d. Ice cream melts into liquid 2. Which of the following is not true about liquids? a. Liquids can flow b. Liquids have fixed volume c. Liquids retain its shape when poured from one container to another d. They do not have fixed size 3. Read the following statements and choose the correct one. Statement A: Melting is the process in which a solid converts into liquid on heating. Statement B: Condensation is the process in which a gas converts into liquid on cooling. a. Only A is correct b. Only B is correct c. Both A and B are correct d. Both A and B are wrong 4. Which of these can be found in all three states of matter? a. Vaseline b. Blood c. Newspaper d. Water 5. While boiling a glass of water, which change occurs in the states of matter? a. Solid in to liquid b. Liquid in to gas c. Gas in to a solid d. Liquid in to solid 6. In which form of matter does matter change its shape according to the shape of the container? a. Solid b. Liquid c. Gas d. Both b and c 7. The moistness of wafers and biscuits get removed in the presence of sunlight by the process of: a. Melting b. Evaporation c. Condensation d. Freezing LEVEL-2 1. Compare the properties of ice, water and steam and complete the table given below. Properties Ice (Solid) Water (Liquid) Steam (Gas) Shape They have fixed shape. They do not have fixed They do not have fixed shape shape Volume They have volume. They have volume. They do not have fixed volume Flow It does not flow They flow. They flow in all directions. 2. Classify the following into solids, liquids and gases [Honey, Oxygen, Juice, Plastic, Cotton, Smoke, Cake, Snow, Oil, Air, Milk, Hydrogen] SOLIDS LIQUIDS GASES Plastic Honey Oxygen Cotton Juice Smoke Cake Oil Air Snow Milk Hydrogen 3.Define evaporation. Write two examples for evaporation. Ans. Evaporation is the process in which liquid converts into gas on heating. Eg – water to steam, drying of wet floor. LEVEL-3 1. Complete the given boxes with the names of changes of matter. [ Evaporation, Melting, Condensation, Freezing] Melting Evaporation freezing Condensation 2. Tom kept some ice cubes in a glass. He observed that some water droplets had formed on the outer surface of the glass. Where could the water droplets have come from? Explain the process behind this. Ans. The water droplets on the outer surface of the glass is due to condensation. When tom placed ice cubes inside the glass, the surface of the glass came into contact with the cold temperature of the ice cubes. This lowered the temperature of the glass surface. 3. Give reason: When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room. Ans. Gases flow faster and fill up the entire space. The gas produce by incense stick mixes with air faster and reach every part of the room. Success criteria I did it I tried it I need to work upon To compare the properties of solids, liquids and gases. To define condensation, evaporation, freezing and melting.  Gulf Asian English School, Sharjah SCIENCE TERM-1 PRACTICE PAPER, 2024-2025 ANSWER KEY Name: ………………………... Class: 3 Sec … Roll No - ………… I. Choose the correct answer: 1. The process of inhale oxygen and exhale carbon dioxide is called: a.Reproduction b.Breathing c.Photosythesis d.Both a and b 2. Insects breathe through a.Spiracles b.Fins c.Gills d.Nose 3. Radhika’s mother kept one bowl of ice-cream in the refrigerator. Suddenly there was a powerfailure and she noted the ice cream changed into liquid after some time. How does it become liquid? a. Ice cream melts into liquid b. Ice cream evaporates into liquid c. Ice cream condenses and becomes liquid d. Sweet milk freezes into liquid ice cream 4. Which of these can be found in all three states of matter? a. Vaseline b. Blood c. Newspaper d. Water 5. Lizards catch insects with their. a.Anennae b.Long sticky tongue c.Trunk d.Thin tubes 6. The moistness of wafers and biscuits get removed in the presence of sunlight by the process of: a. Melting b. Evaporation c. Condensation d. Freezing 7. Which of the following animals do not have sharp, pointed and curved teeth? a.Zebra b.Lion c.Wolf d.Leopard 8. Which of the following is a natural luminous object? a. Torch b. Sun c. Tube light d. Box II. Fill in the blanks: 1. Small pores present mostly on lower side of leaf for gaseous exchange -Stomata 2. A push or pull applied on an object is called - Force 3. The heart pumps blood to all parts of our body. III. Name the following 1. A plant that closes its leaves on touch: Mimosa _ 2. The largest excretory organ of the human body: skin IV. Write two examples for : 1. Non luminous objects: Cupboard, door 2.Carnivores: Lion, Tiger  V.Answer the following: 1.Define the following: a. Evaporation: Evaporation is the process that liquid converts into gas on heating. b. Condensation: Condensation is the process that gas converts into liquid on cooling. c. Freezing: Freezing is the process that liquid converts into solid on cooling. d. Melting: Melting is the process that solid converts into liquid on heating. e. Opaque object: Opaque objects are objects that do not allow light to pass through them. 2. What do you mean by chewing the cud? Animals like cow and buffalo swallow their food without chewing. Later they bring it back to their mouth and keep chewing for hours. This process is called chewing the cud. 3. Write any three characteristics of shadow? a) A shadow is always formed in the opposite side of light source. b) An opaque object and a source of light are required for the formation of shadow. c) In the morning and evening shadows are longer and during noon shadows are shorter. 4. How will our body be effected if the heart is removed? Blood flow becomes impossible and it causes immediate death (cardiac arrest). 5.Compare the properties of ice, water and steam and complete the table given below. Properties Ice (Solid) Water (Liquid) Steam (Gas) Shape They do not have fixedshape. They do not have fixed They have fixed shape. They take the shape of the shape. They fill up entire space of container. the container where it is kept. Volume They do not have fixedvolume They have fixed volume. They have fixed volume. Flow It does not flow They flow. They flow in all directions. 6. Give reason: When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room. Gases flow faster and fill up the entire space. The gas produced by incense stick mixes with air and reach every part of the room. 7. Complete the given table: Organ system Functions: Organs: Circulatory system It carries blood and nutrients to all parts of heart and blood vessels our body. Heart pumps blood which is carried to all the organs by blood vessels. Excretory system It helps in removing waste material from our kidney body through skin(sweat) and urethra(urine). Nervous system It helps in passing information from one part Brain, spinal cord and nerves to another part of our body.