The City School PAF Chapter Comprehensive Worksheet May 2018 Science Class 6 (Answering Key)

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1 The City School PAF Chapter Comprehensive Worksheet May 2018 Science Class 6 (Answering Key) The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 1 of 11

2 SECTION A Q.1. Choose the correct answer:- [ /25] 1. The sugar made by plants is stored in different parts of plants in the form of. a) Glucose b) Starch c) vitamins d) Maltose 2. The energy stored in plants and animals is derived from the. a) Sun b) Soil c) Water d) Air 3. Insectivorous plants grow in soils which are. a) Rich in nutrients. b) Poor in nutrients c) Rich in nutrients and aerated d) Not-aerated 4. is partially or wholly decayed animal or plant matter. a) Humus b) Fertilizers c) Soil d) Clay 5. Iodine solution turns when starch is added in it. a) Yellowish b) Brownish c) Reddish d) Blue-black 6. Clay has size of soil particles. a) Very large b) Very fine c) Large d) Medium 7. The function of chlorophyll is to sunlight. a) Trap b) Reflect c) Divert d) Refract The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 2 of 11

3 8. Flowering plants are dependent upon animals for. a) Budding b) Reproduction c) Food and shelter d) Mates 9. The adaptation for breathing in water a) Gills b) Flippers c) Webbed feet d) Streamlined body 10. A food chain starts with a. a) Consumer b) Predator c) Producer d) Herbivore 11. A panda feeds on. a) Bamboo b) Deer c) Lettuce plant d) Mushroom 12. The of seals and turtles help them to move in water. a) Webbed feet b) Flippers c) Fins d) Swim bladder 13. When an ice melts into water heat energy is. a) Gained b) Loss c) Remain constant d) Varies 14. is a mixture of sodium bicarbonate and citric acid. a) Sugar b) Vinegar c) Fruit salt d) Baking soda The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 3 of 11

4 15. Parallel circuits are useful because a) They require less wiring b) All other components keep working even when one fails. c) They use less electricity d) Their battery works for a long period. 16. Study the circuit below a) Two bulbs are in series and one in parallel. b) Three bulbs in parallel c) Two bulbs and one motor in series d) Three bulbs in series 17. The current can only flow through a. a) Open circuit b) Closed circuit c) Main circuit d) Sub open circuit 18. The path through which current flows is known as a) Diode b) Ammeter c) Route d) Circuit 19. What happens to light when it hits a mirror? a) It gets dimmer b) Its direction changes c) It makes a shadow d) It gets brighter 20. What is light a) What we see with our eyes b) A form of work that reflects c) A form of energy that travels in straight lines d) A source that shine The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 4 of 11

5 21. Which of the following would reflect the light best? a) Wooden table b) Ceramic cup c) Mirror d) Plastic bottle 22. Man-made sources of light are a) Flash lights and stars b) Torches and lamp c) Moon and stars d) Flash light and moon 23. Stars do not appear as bright as the sun because a) They are very close to the earth b) They are very far away c) They do not have their light d) They are very small 24. When light falls on the mirror, it bounces off in other direction is called a) Reflection of light b) Refraction of light c) Rotation of light d) Absorption of light 25. Shadows are formed when light travels in. a) Zig-zag motion b) Circular motion c) Straight lines d) Randomly The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 5 of 11

6 Q2. Match Column A with Column B and write in Column C. [ /15] Column A Column B Column C 1. Gives a lot of heat energy besides light energy. a. Fair test 1g 2. Absorb water and nutrients from the soil. b. Copper 2f 3. Provides nutrients to the plants for their healthy growth. 4. Materials which allow only some light to pass through d. Organic c. Translucent 3d Fertilizers 5. Adaptation to the amount of light e. Battery 5h 6. It can sense the brightness in the surrounding f. Roots 6l 7. Thick fur and fat, black skin, small ears and short tails. g. Filament bulb 7m 8. Things which produce light h. Clasping roots 8n 9. The energy source in an electric circuit i. Closed circuit 9e 10. Continuous or unbroken path through which current flows 11. The circuit consists of more than one path through which current flows. 12. The circuit in which two or more bulbs are connected one after another. 4c j. Series circuit 10i k. Parallel circuit 11k l. Light sensor 12j 13. Good conductor of electricity m. Adaptation to low temperature 14. The path through which current flows n. Light sources 14o 15. Only one variable can be changed at a time in an investigation 13b o. Electric circuit 15a The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 6 of 11

7 Q3. State true or false and rewrite the false statement by correcting the underline word. [ /10] a. Aeroponics plants grow in nutrient rich solution. (False) Hydroponic plants grow in nutrient rich solution. b. The place where a living thing lives is its prey. (False) The place where a living thing lives is its habitat c. Nocturnal animals can see well in night because they have small eyes which are sensitive to light. (False) Nocturnal animals can see well in night because they have large eyes which are sensitive to light. d. Cooking of rice is a reversible change. (False) Cooking of rice is an irreversible change. e. Heat loss can cause a gas to condense into liquid and a liquid to freeze into solid. (True) f. Transparent materials allow most of the light to pass through. (True) g. Wood is an example of translucent material. (False) Wood is an example of opaque material. h. When the switch is turned on the gap in the circuit is open. (False) When the switch is turned on the gap in the circuit is close. i. The path through which electric current flows is known as current way. (False) The path through which electric current flows is known as electric circuit. j. The thickness of wire affects the current flow through the circuit. (True) Q4. Fill in the blanks: - [ /10] a. The habitat of camel is desert. b. Water stick insects and mosquito larva has breathing tubes which extend to the water surface to help them breathing in water. c. Carbon dioxide enters and oxygen leaves the plant through stomata. d. Inorganic fertilizers are man-made fertilizers produced from chemicals hence called chemical fertilizers. e. Carbon dioxide gas is formed when egg shell is mixed with vinegar. f. In reversible changes, no new materials are formed and the original materials can be recovered back easily. g. Light is a form of energy which enables us to see. h. Mirror reflects light and changes the direction of light ray when light falls in its surface. i. When switch is turned on the gap in the circuit is closed. j. A circuit with a gap is called a/an open circuit. The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 7 of 11

8 SECTION B Q1a. Classify the following as reversible or irreversible change. If the change is reversible then briefly describe how change can be reversed. [ /3] a. Boiling of water: It is a reversible change. By condensation we can convert the steam back into water. b. Dissolving salt into water: It is a reversible change. Evaporation is used to reverse this change. c. Mixing sand into water: It is a reversible change. Filtration is used to reverse this change. Q1b. Give two examples of reversible changes brought about by heating and two examples of irreversible changes brought about by heating. [ /2] Reversible changes brought about by heating i) Melting of chocolate ii) Evaporation of water Irreversible changes brought about by heating i) Decomposition of sugar ii) Burning of paper Q2a. Observe the circuit given below and answer the following questions. [ /4] i) Is it a series circuit or parallel circuit? Series ii) Is the switch open or close? Open iii) How many bulbs will light up in this circuit? None iv) How many bulbs will light up if we change the position of the switch? None Q2b. Differentiate between a series circuit and a parallel circuit. [ /1] Parallel Circuit A parallel circuit is one with more than one path through which an electric current can flow Series Circuit When there is only one path for the current to flow the circuit is called series circuit The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 8 of 11

9 Q2c. Draw the sectional diagram of: [ /2] i. Series circuit with one battery and two bulbs. ii. Parallel circuit with one battery and two bulbs Q2d. Write down any four factors which affect current in an electric circuit. [ /2] a. Number of batteries b. Number of bulbs c. Type of wire d. Length or wire e. Thickness of wire Q3a. Look at the picture given below, and answer the questions. [ /3] i. Draw arrows to show how can we can we see the sun and the moon. ii. Is the moon source of light? How can we see moon? Explain your answer. No, moon is not the source of light. We can see moon because it reflects sun s light. Q3b. Define the terms transparent, translucent and opaque materials and give one example of each type of material. [ /6] Transparent material: materials which allow most of the light to pass through. For example glass Translucent material: materials which allow some of the light to pass through. For example paper Opaque material: materials which do not allow light to pass through For example wood The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 9 of 11

10 Q3c. How are shadows formed? How are they different from reflection? [ /2] Shadows are formed when the light is blocked by an opaque object. Reflection is bouncing of light from an object. Q4a. Write down the role of roots in plants growth. [ /2] a) Roots absorb water, nutrients and mineral salts from the soil. b) Roots anchor the plant to the soil. Q4b. Write down the word equation of photosynthesis. [ /2] Sun light Ans. Carbon dioxide + water glucose + oxygen Q4c. Write down the difference between sandy and loamy soil. [ /2] Sandy soil It can t retain water well. Cactus plant grows in sandy soil. Sandy soil does not contain nutrients and moisture. Soil particles are large. Loamy soil It can retain water. Most of the vegetables grow in loamy soil. Loamy soil contains nutrients and moisture. The particles of loamy soil vary in size. Q4d. Write down the names of insectivorous plants. Why do insectivorous plants grow in sandy soil? [ /2] Venus fly trap and pitcher plant. Insectivorous plants grow in sandy soil because they obtain nutrients by consuming the insects. Q5a. Study the food chain below. [ /5] Carrots rabbit snake eagle i. Identify the habitat of the above food chain. Farm ii. Identify the producer in this food. where does it get its food and energy from? Carrot is a producer as it gets its energy from the sun and makes its own food by the process of photosynthesis. iii. Identify the consumers in this food chain. Consumers are rabbit, snake and eagle. iv. How many predators and prey are there in food chain? Name them. There are 2 predators and two prey in this food chain. Predators are eagle and snake whereas preys are snake and rabbit. v. What does a food chain show? A food chain shows how living things get food and how energy is transferred from one organism to another in the form of food. The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 10 of 11

11 Q5b. Write down the adaptations which help the animal to survive in water. [ /2] Thick layer of fat under screen Blowholes Flippers Tail The City School / PAF Chapter/ Comprehensive Worksheet/ May 2018/ SCIENCE/ Class 6 / Ans Key Page 11 of 11