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Science — Practice Paper · Set 1
Part I — Multiple Choice Questions 10 × 1 = 10
Choose the correct answer. (Answer all questions.)
1.Which of the following substances are commonly separated using the churning method? (i) Oil from water (ii) Sand from water (iii) Cream from milk (iv) Oxygen from airi. Oil from waterii. Sand from wateriii. Cream from milkiv. Oxygen from air[1]
2.Which of the following is not a standard unit of measuring length? (i) millimetre (ii) centimetre (iii) kilometre (iv) handspani. millimetreii. centimetreiii. kilometreiv. handspan[1]
3.The temperature shown by the thermometer in Fig. 7.10 is (i) 28.0 °C (ii) 27.5 °C (iii) 26.5 °C (iv) 25.3 °Ci. 28.0 °Cii. 27.5 °Ciii. 26.5 °Civ. 25.3 °C[1]
4.Four students used a laboratory thermometer to measure the temperature of water as shown in Fig. 7.6: Who do you think followed the correct way for measuring temperature? (i) Student 1 (ii) Student 2 (iii) Student 3 (iv) Student 4i. Student 1ii. Student 2iii. Student 3iv. Student 4[1]
5.What purpose does handpicking serve in the process of separation? (i) Filtration (ii) Sorting (iii) Evaporation (iv) Decantationi. Filtrationii. Sortingiii. Evaporationiv. Decantation[1]
6.The normal temperature of a healthy human being is close to ----------------. (i) 98.6 °C (ii) 37.0 °C (iii) 32.0 °C (iv) 27.0 °Ci. 98.6 °Cii. 37.0 °Ciii. 32.0 °Civ. 27.0 °C[1]
7.Which of the following is not a member of our Solar System? (i) Sirius (ii) Comets (iii) Asteroids (iv) Plutoi. Siriusii. Cometsiii. Asteroidsiv. Pluto[1]
8.The range of a laboratory thermometer is usually ----------. (i) 10 °C to 100 °C (ii) -10 °C to 110 °C (iii) 32 °C to 45 °C (iv) 35 °C to 42 °Ci. 10 °C to 100 °Cii. -10 °C to 110 °Ciii. 32 °C to 45 °Civ. 35 °C to 42 °C[1]
9.Which of the following best describes condensation? (i) The conversion of water into its vapour state. (ii) The process of water changing from a liquid into gaseous state. (iii) The formation of clouds from tiny water droplets. (iv) The conversion of water vapour into its liquid state.i. The conversion of water into its vapour state.ii. The process of water changing from a liquid into gaseous state.iii. The formation of clouds from tiny water droplets.iv. The conversion of water vapour into its liquid state.[1]
10.Atharv performed an experiment in which he took a bar magnet and rolled it over a heap of steel U-clips (Fig. 4.15). According to you, which of the options given in Table 4.3 is likely to be his observation? Table 4.3: Number of pins attracted by the magnet at its various positions. (i) Position A: 10, Position B: 2, Position C: 10 (ii) Position A: 10, Position B: 10, Position C: 2 (iii) Position A: 2, Position B: 10, Position C: 10 (iv) Position A: 10, Position B: 10, Position C: 10i. Position A: 10, Position B: 2, Position C: 10ii. Position A: 10, Position B: 10, Position C: 2iii. Position A: 2, Position B: 10, Position C: 10iv. Position A: 10, Position B: 10, Position C: 10[1]
Part II — Short Answer Questions 12 × 2 = 24
Answer briefly. (Answer all questions.)
11.During a clear night, try to observe the Big Dipper 3-4 times at an interval of 2 to 3 hours. Also try to locate the Pole Star each time. Does the Big Dipper appear to move? Draw a rough sketch to illustrate this, mentioning the time in each case.[2]
12.Match the mixtures in Column I with their method of separation in Column II. Column I: (i) Gram flour mixed with black gram (ii) Chalk powder mixed with water (iii) Corn mixed with potatoes (iv) Iron powder mixed with sawdust (v) Oil mixed with water. Column II: (a) Handpicking (b) Magnetic separation (c) Decantation (d) Sieving (e) Filtration[2]
13.Give examples of liquids other than water that evaporate.[2]
14.Names of some animals are given below. Group them based on their habitats. Write the names of aquatic animals in the area marked ‘A’ and terrestrial animals in the area marked ‘B’. Enter the names of animals living in both habitats in part ‘C’. Horse, Dolphin, Frog, Sheep, Crocodile, Squirrel, Whale, Earthworm, Pigeon, Tortoise[2]
15.You are given a coin. Estimate how many coins are required to be placed one after the other lengthwise, without leaving any gap between them, to cover the whole length of the chosen side of a notebook. Verify your estimate by measuring the same side of the notebook and the size of the coin using a 15-cm scale.[2]
16.Measure the height of your friend and express it in (i) metres (ii) centimetres and (iii) millimetres.[2]
17.An artist's representation of the Solar System is given in Fig. 12.12. Is the order of the planets correct? If not, write the correct order in the boxes in the figure.[2]
18.Colour to show the red column on the drawings of thermometers (Fig. 7.7) as per the temperatures written below: 14 °C, 17 °C, 7.5 °C.[2]
19.Manu’s mother maintains a kitchen garden. One day, she was digging out radish from the soil. She told Manu that radish is a kind of root. Examine a radish and write what type of root it is. What type of venation would you observe in the leaves of radish plant?[2]
20.Why are millets considered a healthy choice of food? Can eating just millets suffice for the nutritional requirements of the body? Discuss.[2]
21.Read the following statements and mark True (T) or False (F) against each. (i) The motion of a car moving on a straight road is an example of linear motion. (ii) Any object which is changing its position with respect to a reference point with time is said to be in motion. (iii) 1 km = 100 cm[2]
22.Fans move air around, creating a cooling sensation. It might seem strange to use a fan to dry wet clothes since fans usually make things cooler, not warmer. Normally, when water evaporates, it requires heat, not cold air. What do you think about this?[2]
🔑 Show Answer Key — Set 1
- 1. (iii) Cream from milk
- 2. (iv) handspan
- 3. (ii) 27.5 °C
- 4. (iii) Student 3
- 5. (ii) Sorting
- 6. (ii) 37.0 °C
- 7. (i) Sirius
- 8. (ii) -10 °C to 110 °C
- 9. (iv) The conversion of water vapour into its liquid state.
- 10. Option (i) is likely: Position A: 10, Position B: 2, Position C: 10.
- 11. Yes. The Big Dipper appears to change its position with time and seems to move around the Pole Star. The Pole Star appears nearly fixed in the north direction. A rough sketch should show the Big Dipper at different positions around the Pole Star at different times.
- 12. (i) Gram flour mixed with black gram - (d) Sieving; (ii) Chalk powder mixed with water - (e) Filtration; (iii) Corn mixed with potatoes - (a) Handpicking; (iv) Iron powder mixed with sawdust - (b) Magnetic separation; (v) Oil mixed with water - (c) Decantation.
- 13. Examples include alcohol, perfume, petrol, nail-polish remover and hand sanitiser.
- 14. A: Dolphin, Whale. B: Horse, Sheep, Squirrel, Earthworm, Pigeon. C: Frog, Crocodile, Tortoise.
- 15. Sample answer: If the chosen notebook side is 24 cm and the coin diameter is 2 cm, then 24 ÷ 2 = 12 coins are required.
- 16. Sample answer: If the measured height is 1.45 m, then it is 145 cm and 1450 mm.
- 17. No, the order shown is not correct. The correct order of planets from the Sun is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
- 18. The red column should be drawn up to 14 °C on the first thermometer, 17 °C on the second thermometer and 7.5 °C on the third thermometer.
- 19. Radish is a taproot. Its leaves show reticulate venation.
- 20. Millets are considered healthy because they are nutri-cereals and provide many nutrients needed by the body. They can also grow in different climatic conditions. However, eating only millets is not enough because the body needs a balanced diet with proteins, fats, vitamins, minerals, dietary fibre and water in proper amounts. Millets should be part of a varied balanced diet.
- 21. (i) True (ii) True (iii) False
- 22. A fan helps wet clothes dry faster because moving air carries away water vapour from near the clothes. This allows more water to evaporate. Evaporation takes heat from the clothes and surroundings, so the clothes may feel cooler while drying even though the drying becomes faster.