2010 PSLE Science Revision Set 3. Science PSLE Science Revision Set 3. Total Time for Booklets A&B: 1h 45min James Ang Tutors

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1 Science 2010 PSLE Science Revision Set 3 Booklet A: Booklet B: Total: /60 marks /40 marks /100 marks Total Time for Booklets A&B: 1h 45min 1

2 Booklet A 30 Questions 60 Marks For each question from 1 to 30, 4 options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Shade the correct oval (1,2,3 or 4) on the Optical Answer Sheet (OAS) provided. 1. When air is pumped into a balloon, the balloon becomes bigger. This shows that air. A: can be compressed B: occupies space C: has weight (1) Only A is correct. (2) Only B is correct. (3) Only A and B are correct. (4) A, B and C are all correct. 2. When a rubber fruit explodes, its seeds are thrown at a distance away from the parent plant. What does this phenomenon ensure? (1) Animals cannot find the seeds easily. (2) The seeds can germinate faster. (3) The young plant gets enough of its basic needs. (4) The young plant will not outgrow its parent plant. 2

3 3. Janie is suffering from constipation. She should take in more. (1) fish and prawn (2) fruits, vegetable and water (3) bread and butter (4) chicken and eggs 4. Which part of the compass is magnetic? (1) The four points, North, South, East and West. (2) The frame of the compass. (3) The needle in the compass. (4) The pivot of the compass. 5. Nadia placed two eggs she had bought from the supermarket among those a mother hen was incubating. After three weeks all the eggs hatched out except the two put there by Nadia. Why do you think Nadia s eggs did not hatch? (1) Their shells were too thick. (2) They were not fertilized eggs. (3) They were not laid by the same hen. (4) They were not given enough warmth. 3

4 6. Which one of the following graphs shows the correct relationship between temperature and the rate of evaporation? 4

5 7. What happens to the volume of air when it is compressed? (1) It is reduced. (2) It is increased. (3) It remains the same. (4) It evaporates. 8. Refer to the Venn diagram as per illustrated below Which one of the animals, P, Q, R or S is a dragonfly? (1) P (2) Q (3) R (4) S 9. Which of the following statements about decomposers is true? (1) All decomposers are microscopic animals. (2) Decomposers are not useful at all. (3) Low temperature makes decomposers active. (4) Decomposers need moisture to become active. 5

6 10. If Ray A is the path of the reflected light, the ray of light strikes the mirror at. (1) B (2) C (3) D (4) E 11. Which of the following statements about changes are true? A: Changes take place around us all the time. B: Water can cause a change to take place. C: Some changes take place quickly. D: All changes are reversible. (1) A and C only (2) B and D only (3) A, B and C only (4) A, B, C and D 6

7 12. A moving object hits and moves another object at rest. This shows that the moving object. A: has energy B: can do work C: exerts a force D: speeds up a motion (1) A only (2) A and B only (3) A, B and C only (4) A, B, C and D 13. Which of the following is not a source of energy? (1) Battery (2) Water (3) Sun (4) Microwave Oven 14. In which part of the digestive system is excess water absorbed? (1) Gullet (2) Stomach (3) Small intestine (4) Large intestine 7

8 15. A metal rod is heated as per illustrated in the diagram below. Which of the following actually took place? (1) Heat travelled from A to D. (2) Heat travelled from D to A. (3) Heat travelled from B to A as well as from B to D. (4) Heat travelled from D to B as well as from B to A. 16. Petrol provides energy to move a car as. (1) it has kinetic energy (2) energy can be created (3) it has no energy until it burns (4) energy can be changed from one form to another 17. Lily moves a pencil closer to a brighter light. The shadow of the pencil becomes. (1) shorter (2) longer (3) lighter (4) darker 8

9 18. Which of the following animals takes in air in the same way as a young tadpole? (1) Tubifex worms (2) Pond skater (3) Water boatman (4) Dragonfly nymph 19. Refer to the table below. Food Producer Food Consumer Eats plants only Eats animals only Maize Plant Yes No No No No Python No Yes No Yes No Giraffe No Yes Yes No No X No Yes No No Yes Eats both plants & animals Which one of the following animals represents X in the above table? (1) Tiger (2) Owl (3) Zebra (4) Monkey 20. Which of the following animals is harmful in its larvae stage? (1) Butterfly (2) Grasshopper (3) Aphid (4) Cockroach 9

10 21. Amelia grouped 6 activities as shown in the table below. Group A Making a pancake Lighting a match Baking a cake Group B Stretching a rubber band Blowing up a balloon Pressing a rubber duck She grouped the activities according to. (1) how fast the changes can be seen (2) whether the changes can be reversed (3) the amount of heat that is produced (4) the amount of force needed to produce the change 22. Refer to the circuit diagram below. Which of the following switch/switches control(s) Bulb 3? (1) S1 and S4 only (2) S2 and S4 only (3) S3 and S4 only (4) S4 only 10

11 23. Which one of the following fruits has the same type of skin as the mango? (1) Soursop (2) Rambutan (3) Lychee (4) Papaya 24. A wooden crate is used to store fruits rather than a paper box as. (1) it is heavy (2) it is waterproof (3) it does not tear easily (4) it is heat-resistant 25. Which of the following statements is false? (1) The bigger your size, the more blood your body contains. (2) Old people have slower heartbeats than young children. (3) Your heartbeat will be faster if you are excited. (4) Your body takes in less oxygen when you exercise. 11

12 26. Two magnets are placed as shown. Magnet B is able to float as it is facing the like pole of Magnet A. What will take place if only Magnet B is removed and turned over such that it faces the unlike pole of Magnet A? There will be of the magnets. (1) no change (2) a change in size (3) a change in shape (4) a change in position 27. In which part(s) of the digestive system are juices added to food to break them down? A: Mouth B: Stomach C: Small intestine D: Large intestine (1) B only (2) C only (3) A, B and C only (4) A, B, C and D 12

13 28. Which plant part does not perform the function described next to it? Plant Part Function (1) Leaf Helps to lose excess water (2) Flower Germinates and grows into seeding (3) Stem Transports water, nutrients and food (4) Root Holds the plant firmly to the ground 29. What is the temperature range of a clinical thermometer? (1) 25 o C to 40 o C (2) 35 o C to 43 o C (3) 4 o C to 36 o C (4) 0 o C to 100 o C 30. When current is flowing through a circuit smoothly, the circuit is said to be. A: closed B: complete C: open D: polarized (1)A and B (2)A and C (3)B and C (4)C and D 13

14 Booklet B 14 Questions 40 Marks Answer all the questions in the spaces provided. 31. Why is the filament of the light bulb made up of tungsten? [2m] 14

15 32. (a) Given some honey, salted vegetable, cough syrup, and lemon, which part of our tongue will be able to tell the difference? [1m] (b) In the table below, fill in the blanks with honey, salted vegetable cough syrup and lemon. [2m] Taste Sour Bitter Sweet Salty Food 15

16 33. Name two factors that will affect the strength of an electromagnet. [2m] 34. Look at the screwdriver shown below. Name the material which may be used to make each of the following parts. [2m] X: Y: 16

17 35. Ice melts at 0 o C. A very big block of ice is left in a small room to melt. In the table below, state what happens to the temperature of the ice, water and small room while the ice is melting, whether it increases, decreases or no change. [3m] Ice Water Room Temperature 36. While using a fast moving escalator at a shopping centre on a busy day, Tracy found that the handrail of the escalator was very warm. What energy change took place at the handrail? [2m] 17

18 37. (a) How do the following animals breathe? [3m] Snake: (i) Toad: (ii) (iii) (b) A toad is adapted to live both on land and water. Give another characteristic of the toad to support this statement. [1m] 38. Refer to the table below. Habitat X It covers a small area and has many dead leaves Air does not move freely. It is always in the darkness. The temperature is constant throughout the day. Habitat Y It covers a wide area and has many populations. Air moves freely. It has regular periods of brightness and darkness. The temperature changes frequently. (a) Identify the two habitats based on the above descriptions. [2m] Habitat X: Habitat Y: (b) Name two animals which could be found living in both habitats. [2m] 18

19 39. Kelvin visited his grandmother during Chinese New Year. Her grandmother exclaimed to him that he had reached puberty. List down two changes that take place when a boy reaches puberty. [2m] 40. The following illustration shows a green bean seed. Fill in the blanks with the names of the parts of the seed. [3m] 19

20 41. In order to make a glass of milk, Wendy added 3 spoonfuls of milk powder to a glass of hot water. (a) List two changes observed using all of our five senses in the hot water. [2m] (b) What caused these changes? [1m] 20

21 42. (a) State what happens to the food and how it is transported to all parts of the body when it goes through the small intestine. [2m] (b) Why does the heart beat faster when we exercise? [2m] 21

22 43. A wet towel was hung out to dry as illustrated in the diagram below. (a) Which part of the towel (A, B, C and D) of the towel would most likely be the wettest after 10 minutes? [1m] (b) Explain your answer in (a). [1m] 22

23 44. The illustrations below show the different parts of plants. Name the parts labeled X and Y and state their functions. [4m] X: Function of X: Y: Function of Y: -End of Paper- 23