Answered WASSCE Int. Science 2003 – Objective Test A

1. A root tuber among the following crops is

A. cassava
B. groundnut
C. onion
D. yam

A

2. The process by which molecules actually move from their original position and carry heat through a medium is

A. conduction
B. convection
C. radiation
D. sublimation

B

3. Menopause is a condition experienced by

A. baby girls
B. middle aged women
C. teenage girls
D. very old women

B

4. Work is done on a box when one

A. carries a box on the head while standing
B. drags a box on the floor
C. walks with the box on the head
D. is pushed against an immovable box

B

5. Pulmonary circulation involves the movement of the blood from the

A. heart to the body and back
B. heart to the lungs and back
C. lungs to the heart and back
D. lungs to the body and back

B

6. The causative organism of gumboro disease in poultry is a

A. bacterium
B. fungus
C. protozoa
D. virus

D

7. Loading a program onto a computer is referred to as

A. installing
B. processing
C. setting up
D. systemizing

A

8. The condition of a child suffering from kwashiokor may improve when fed on

A. boiled egg
B. fish liver oil
C. fresh bread
D. orange juice

A

9. The mineral which strengthens the tooth is

A. calcium
B. magnesium
C. potassium
D. sodium

A

10. Which of the following compounds is a hydrocarbon?

A. C2H6
B. C6H12O6
C. CH3CH2OH
D. NaHCO3

A

11. Which of the following grain is a cereal?

A. Cowpea
B. Groundnunt
C. Millet
D. Soyabean

C

12. What gas is produced when metals react with acids?

A. Carbon dioxide
B. Hydrogen
C. Oxygen
D. Water vapour

B

13. The functional group for alkanol is

A. WSCI 2003 q13 A

B. WSCI 2003 q13 B

C. WSCI 2003 q13 C

D. WSCI 2003 q13 D

 

Ans: D

14. Which of the following substances is a common household chemical?

A. chloroform
B. hydrogen peroxide
C. iodine tincture
D. sodium carbonate

C

15. An object is placed between the optical centre and the principal focus of a converging lens. The image formed is

A. magnified, real and inverted
B. magnified, virtual and erect
C. diminished, real and inverted
D. diminished, virtual and erect

B

16. Damaged tissues of the human body are repaired by

A. carbohydrates
B. lipids
C. proteins
D. vitamins

C

17. Which of the following statements about an atom is true?

A. The atomic number is greater than the mass number
B. The L electron shell is the closest shell to the nucleus
C. Neutrons are contained in the nucleus of the atom
D. Protons out number electrons in a neutral atom

C

18. In birds grinding of food substances occurs in the

A. beak
B. crop
C. gizzard
D. oesophagus

C

Use the following agricultural practices to answer questions 19 and 20

I. deworming
II. dehorning
III. debeaking
IV. decombing

19. Which of the practices above is applicable to both poultry and sheep production?

A. I
B. II
C. III
D. IV

A

20. Which of the practices above are applicable to sheep production?

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

A

21. A plastic comb passed through dry hair a number of times can pick up pieces of paper because

A. electrons are transferred from the comb to the hair
B. the nuclei of atoms of the comb have been made unstable
C. atoms are transferred from the comb to the hair
D. the comb has been charged by induction

A

22. It is more difficult to detect carbon monoxide gas than most poisonous gases because it

A. is heavier than air
B. is insoluble in water
C. has no smell and colour
D. does not support combustion

C

23. The inner layer of the cerebrum is whitish because

A. it consist of numerous cell bodies
B. the neurones present are myelinated
C. sufficient blood does not flow into that layer
D. the schwann cells of the axons are absent

B

24. A body has a density of 100.0 kgm−3. If its mass is 4.0 kg, calculate its volume

A. 4.0 x 103 m3
B. 4.0 x 102 m3
C. 4.0 x 10−2 m3
D. 4.0 x 10−3 m3

C

25. Which of the following units store the greatest number of characters in computer?

A. Byte
B. Gigabytes
C. Kilobytes
D. Megabytes

B

26. Keepers are used to store magnets in order to

A. increase the strength of the magnet
B. cancel the effect of the earth's magnetism
C. reduce self-demagnetisation
D. protect the magnets when they fall

C

27. A major difference between clayey soil and sandy soil lies in their

A. colour
B. humus content
C. mineral content
D. texture

D

28. What is the equivalent of 37ºC on the Kelvin scale?

A. 37 K
B. 137 K
C. 236 K
D. 310 K

D

29. During low tides

A. organisms are washed to the shore
B. some organisms are exposed to their predators
C. wave action becomes very strong
D. the substratum at the shore becomes unstable

B

30. Which of the following plants can be used as an avenue plant?

A. Banana plant
B. Milkbush plant
C. Pawpaw plant
D. Royal date palm plant

D

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