INTEGRATED SCIENCE APRIL 2012 ( BECE )

1. The S.I. unit for measuring the work done by a force is

2. The chemical formula of a compound describes the

3. Which of the following life processes is represented by the equation Glucose + oxygen → carbon dioxide + water + energy

4. Each layer of soil profile is known as

5. When the p-n junction of a transistor is reverse biased

6. When a solid-liquid mixture is filtered, the liquid that separates out into the container is called

7. Which of the following processes involves the solid state of matter?

8. Which of the following farming systems is most effective in maintaining soil fertility?

9. The disease in humans which is associated with insufficient intake of calcium is

10. The arrow in the circuit symbol of either n-p-n or p-n-p transistor is always on the

11. Which of the following insect pests of crops has piercing and sucking mouthparts?

12. A reflex action involves the

13. The type of image formed in a plane mirror is always

14. Which of the following statements about acids are correct? I. They turn red litmus paper blue II. They can be classified as either organic or mineral acids III. They can be neutralized by bases

15. A transistor is said to operate in an active region when

16. Tuberculosis is spread

17. One function of engine oil in the engine of a tractor is to

18. Black pod is a disease of

19. The efficiency of a machine is always less than 100% because part of the energy input is used to

20. Which of the following electronic components are used to produce oscillator circuits? I. Transistor II. Inductor III. Capacitor

21. Which of the following sources of light is natural?

22. Which of the following substances are carried by the blood?

23. The practice of starting new organization in response to identified opportunities is termed

24. The sub-atomic particle with zero charge in the nucleus of an atom is called

25. Which of the following management practices greatly helps in record keeping?

26. In the pin-hole camera, when the size of the pin-hole is increased, the image formed is

27. Non-reactive metals are preferred in making ornaments and jewellery because they

28. Producers in an ecosystem are plants that

29. The use of resistant varieties of crop in controlling diseases is described as

30. The chemical formula for aluminium oxide is represented as Al x O y . The values of x and y are respectively

31. In electrical circuits, the component that protects appliances against very high currents is the

32. One benefit of technology to industrialization is

33. Which of the following factors contribute to early parenthood? I. Poverty II. Illiteracy III. Lack of parental care IV. Peer pressure

34. Which of the following examples of fertilizers improves soil texture?

35. The reaction between hydrochloric acid and sodium hydroxide produces

36. In modern electrical wirings the colour code for the live wire is

37. An example of soil minor nutrient is

38. The complete development of a human foetus in the womb normally takes

39. A material that allows a small amount of light energy to pass through it but cannot be seen through is referred to as

40. The leads of the transistor responsible for activation is the