Answered BECE Integrated Science 2012 – Objective

INTEGRATED SCIENCE 1

 1 hour

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

A. J.
B. K.
C. N.
D. W.

Answer: C

2. The chemical formula of a compound describes the

A.  number of molecules in the compound
B.  type of bonding in the compound
C.  ratio in which the elements are combined
D.  state of the compound

C

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

A. Digestion
B. Excretion
C. Photosynthesis
D. Respiration

D

4. Each layer of soil profile is known as

A. horizon
B. litter
C. regolith
D. solum

A

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

A.  current flows from the p-type to the n-type
B.  no current flows from the p-type to the n-type
C.  conduction of current occurs
D.  current flows from the n-type to the p-type

B

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

A. filtrate
B. residue
C. sediment
D. solution

A

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

A. Boiling
B. Condensation
C. Evaporation
D. Melting

D

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

A. Crop rotation
B. Land rotation
C. Mixed cropping
D. Monoculture

A

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

A. goiter
B. kwashiorkor
C. rickets
D. scurvy

C

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

A. base lead
B. collector lead
C. emitter lead
D. receiver lead

D

11. Which of the following insect pests of crops has piercing and sucking mouth-parts?

A. Aphids
B. Grasshoppers
C. Stemborers
D. Termites

A

12. A reflex action involves the

A. brain and muscles
B. brain and nerves
C. spinal cord and muscles
D. spinal cord and nerves

D

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

A. diminished
B. enlarged
C. real
D. virtual

D

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

A. I and II only
B. I and III only
C. II and III only
D. I, II and III

C

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

A.  one p-n junction is forward biased and the other is reversed biased
B.  base-emitter junctions are reversed biased
C.  both p-n junctions are reversed biased
D.  base-collector junction is forward biased

A

16. Tuberculosis is spread

A.  through eating of contaminated food
B.  when an infected person coughs openly into the air
C.  through shaking of hands of infected persons
D.  through sharing of contaminated syringes

B

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

A. warm the engine
B. enhance air intake
C. ensure proper mixing of fuel
D. lubricate the engine parts

D

18. Black pod is a disease of

A. cocoa
B. coffee
C. guava
D. mango

A

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

A. stop the machine after working
B. perform useful work on the load
C. overcome friction
D. lift the machine up

C

20. Which of the following electronic components are used to produce oscillator circuits?

I. Transistor
II. Inductor
III. Capacitor

A. I and II only
B. I and III only
C. II and III only
D. I, II and III

D

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

A. Filament bulb
B. Fluorescent tube
C. Glow worm
D. Fire cracker

C

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

I. Hormones
II. Urine
III. Oxygen
IV. Carbon dioxide

A. II and IV only
B. 1, II and III only
C. I, II, III and IV
D. I, III and IV only

D

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

A. agribusiness
B. business enterprise
C. entrepreneurship
D. management

C

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

A. electron
B. ion
C. neutron
D. proton

C

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

A. Culling
B. Debeaking
C. Dehorning
D. Identification

D

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

A. blurred
B. erect
C. magnified
D. virtual

A

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

A. are attractive
B. do not react with atmospheric oxygen
C. do not retain their lustre
D. are corrosive

B

28. Producers in an ecosystem are plants that

A. attract insects
B. feed on other plants
C. manufacture their own food
D. trap insects

C

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

A. biological control method
B. chemical control method
C. cultural control method
D. physical control method

A

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

A. 3 and 2
B. 3 and 1
C. 1 and 3
D. 2 and 3

D

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

A. capacitor
B. fuse
C. resistor
D. switch

B

32. One benefit of technology to industrialization is

A. environmental pollution
B. reduction in skilful labour
C. provision of machinery
D. increase in cost of production of goods

C

33. Which of the following factors contribute to early parenthood?

I. Poverty
II. Illiteracy
III. Lack of parental care
IV. Peer pressure

A. I and II only
B. II and III only
C. III and IV only
D. I, II, III and IV

D

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

A. Compost
B. NPK
C. Sulphate of ammonia
D. Urea

A

35. The reaction between hydrochloric acid and sodium hydroxide produces

A. sodium oxide only
B. sodium chloride only
C. sodium oxide and water
D. sodium chloride and water

D

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

A. blue
B. brown
C. green
D. green and yellow

B

37. An example of soil minor nutrient is

A. calcium
B. iron
C. nitrogen
D. phosphorus

B

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

A. 7 months
B. 8 months
C. 9 months
D. 10 months

C

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

A. opaque
B. reflective
C. translucent
D. transparent

C

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

A. amplifier
B. base
C. collector
D. emitter

B