Final Examination 2009

FINAL EXAMINATION 2008 SCIENCE ( FORM 2) Time: 1 hour 30 minutes. Instruction: Each question has four options A, B, C and D. Choose the best answer.

Figure 1 1. Figure 1 shows the cross-section of the ear. Which part of the ear transmits nerve impulses from the cochlea to the brain? A. P B. Q C. R D. S V – Semicircular tube W – Auditory nerve X – Ossicle Y – Cochlea

B. reabsorb water C. kill microorganisms D. digest fats 5. Which of the following does not belong to a pond community? A. Snail B. Tadpoles C. Lotus D. Jellyfish

2. Which of the ear part mentioned above is important for keeping the body’s balance? A. V B. W C. X D.Y 3. Which of the receptors found in the skin allows a person to feel a thorn prick? A. Pain receptors B. Heat receptors C. Cold receptors D. Touch receptors

Figure 3 6. Figure 3 shows a wheelbarrow containing sand being pushed up an inclined plane. In which of the directions A, B, C and D, will friction act on the wheelbarrow? 7. A worker of mass 53 kg carries a bag of 20 N and climbs a stairs 4 m high in 40 seconds. What is his power? A. 49 W B. 50 W C. 55 W D. 60 W

Figure 2 4. The function of the part labelled Z in Figure 2 is to A. break down starch into glucose 1

Figure 4 8. Figure 4 shows the positions of a hanging balance when weights of 50 kg and 40 kg are hung onto a wooden plank. At which of the fixed points J, K, L and M must the fulcrum be placed so that the balance is vertical? A. J B. K C. L D. M

Figure 5 9. The receptors shows in Figure 5 respond to the sense of touch, pain, heat and pressure. What do the parts labelled P, Q, R and S represent? P Q R S Touch Heat Pain Pressur e Pressur Heat Pain Touch Pain Heat

Pressur Touch Heat e Pain Pressur Touch e

10. What will happen when the eye is exposed to sunlight? A. The cornea expands B. The pupil becomes smaller C. The ciliary muscles contract D. The eye lens becomes short and fat

Figure 6

11. Figure 6 shows the pH value of some substances. Which substance is paired incorrectly with its pH value? A. Battery acid B. Detergent C. Toothpaste D. Milk of magnesia 12. The following are the safety precautions taken when using gas under high pressure. Which is incorrect? A. Check for gas leaking from time to time B. The gas cylinder must be placed in a vertical position C. Keep the gas cylinder in a closed up room under lock and key. D. Place the tank containing gas under high pressure away from heat 13. A force can have the following effects on an object, except changing the… A. shape of the object B. mass of the object C. speed of the object D. direction of the object

Figure 7 14. What type of force is shown in Figure 7? A. Electrical force B. Frictional force C. Electrostatic force D. Gravitational force 15. The unit for work is… A. Newton (N) C. watts (W)

B. Newton-meter (Nm) D. kilogram (kg)

Figure 8 2

16. What type of force is shown in Figure 8? A. Gravitational force B. Electrostatic force C. Magnetic force D. Frictional force 17 A boy weighing 300 N walks 30 m from one end of the field to another. How much work is done? A. 300 J B. 600 J C. 750 J D. 9000 J

B. the buoyancy of water C. the fluid in their body D. their backbone 22. Which of the following belongs to the first class lever?

18. Which of the following activities shows that work is not done?

23. A man does 900 J of work to lift a box to a height of 3 m. What is the weight of the box? A. 90 N B. 300 N C. 270 N D. 900 N 24. ____________ are adventitious roots produced above the ground, often for climbing. A. Tap roots B. Fibrous roots C. Buttress roots D. Aerial roots 19. Which invertebrates has a hydrostatic skeleton? A. Snail B. Bee C. Grasshopper D. Caterpillar

25. The role of the ____________ is to prevent the sun’s ultra violet ray from reaching the earth. A. ionosphere layer B. exosphere layer C. ozone layer D. troposphere layer 26. Apple contains ___________. A. tartaric acid B. malic acid C. acetic acid D. citric acid 27. Which of the following is not a natural sources of water? A. Filtered water B. Spring water C. Glaciers D. Rain

Figure 9 20. Which of the shapes in Figure 9 has the smallest surface area? A. J B. K C. L D. M

28. The following works on the principle of the lever system except A. using a can opener B. fishing C. climbing up the stairs D. lifting a brick with your hand

21. The weight of aquatic vertebrates is supported by… A. a strong endoskeleton 3

34. Food web in the paddy field. How many food chains are there in the food web? A. 8 B. 10 C. 9 D. 11 29. How much effort is required to keep K in balance? A. 25 N B. 50 N C. 50 N D. 100 N 30. Ah Meng who weight 500 N lifted a box of books up a cupboard 2 m high. The box weighs 60 N. How much work is done by Ah Meng? A. 120 J B. 1000 J C. 1120 J D. 1200 J 31. How much power is used if Ah Meng takes 5 seconds to reach the top of the cupboard? A. 112 W B. 224 W C. 422 W D. 424 W 32. Which is the least stable?

For questions 35 to 40, each question can have more than one correct answer. Read carefully and give your answer according to the following instructions summary: Instructions Summary A B C D I, II and I and II II and III I only III only only 35. The human tongue has receptors specialised for sensing I hot taste II salty taste III sweet taste 36. Which of the following form(s) an ecosystem? I Animals II Plants III The physical environment • • •

33. The clearing of forest can cause the loss of the following except A. habitat B. the means to improve crops C. a source of food D. half the air surrounding the environment

Non-segmented body Soft body Body covered with shell

37. The information above relates the characteristics of some animals, such as… I the oyster II the starfish III the tapeworm

Figure 10 38. Which organisms are primary consumers in the food web shown in Figure 10? 4

I II III

Frog Grasshopper Rat

39. Photosynthesis produces… I carbon dioxide II oxygen III glucose 40. The different types of simple machines are… I inclined planes II wheels and axles III pulleys

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