Integrated Science BECE 1999

August 1999
45 minutes

1. A mixture of sand and common salt could be separated by
A. filtration and distillation
B. dissolution and evaporation
C. dissolution, sedimentation and evaporation
D. dissolution, filtration and evaporation
E. sedimentation and filtration

2. What structure links the mouth to the stomach
A. Colon
B. Duodenum
C. Oesophagus
D. Rumen
E. Trachea

3. Which of the following organisms causes bilharziasis?
A. Blood fluke?
B. Bloodworm
C. Liver fluke
D. Roundworm
E. Tapeworm

4. Which of the following processes is a chemical change?
A. Digestion of starch by saliva
B. Melting of wax
C. Dissolution of sugar in water
D. Boiling of water
E. Evaporation of sea water

5. An atom has 5 protons and 5 neutrons in its nucleus. How many electrons are present in the atom?
A. 1
B. 2
C. 5
D. 9
E. 10

6. Which of the following features in plants are used for defence?
A. Buds
B. Leaf spines
C. Pitchers
D. Roots
E. Tendrils

7. The ability of birds to fly depends on
A. Their hollow hones only
B. Their flight feathers only
C. Their feathers covering their bodies
D. Their hollow bones and flight feathers
E. Their light bodies only

8. Gases are more compressible than solids because:
A. Solids have harder surfaces
B. There are wider spaces between gas molecules
C. Gases have fixed volumes
D. The particles of solids are regularly arranged
E. The molecules of gases are randomly arranged

9. Which of the following statements about machines is/are true?
I. The commonest and simplest of all machines is the lever
II. The efficiency of a machine is the ratio of work output to work input
III. The efficiency of a machine is usually less than one
IV. Machines make working much easier and convenient

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

10. Which of the following substances reacts with ammonium chloride to produce ammonia gas?
A. Calcium hydroxide
B. Calcium chloride
C. Calcium carbonate
D. Calcium sulphate
E. Calcium nitrate

11. Plastic materials may be used to make the handles of cooking utensils because they are
A. Hard
B. Poor conductors of heat
C. Attractive
D. Easy to wash
E. Not poisonous

12. Which of the following substances will turn red litmus paper blue?
A. Hydrochloric acid
B. Sodium chloride solution
C. Sulphuric acid
D. Water
E. Sodium hydroxide

13. The heat of the sun reaches the earth through
A. radiation
B. convection
C. conduction
D. both radiation and conduction
E. both radiation and convection

14. The mineral salts in dead organisms become available to the soil through
A. Decomposition
B. Diffusion
C. Fermentation
D. Leaching
E. Manuring

15. A ray of light is incident at an angle of 30° to the surface of a plane mirror. Calculate the angle of reflection.
A. 30°
B. 60°
C. 90°
D. 120°
E. 180°

16. Salt could be obtained from sea water by
A. boiling
B. condensation
C. decantation
D. distillation
E. evaporation

17. A fertilised ovum is known as
A. a gamete
B. a zygote
C. oocyte
D. an ovary
E. a foetus

18. The smallest planet known in the solar system is
A. Earth
B. Jupiter
C. Mars
D. Mercury
E. Venus

19. The organic constituent of the soil is
A. Air
B. Humus
C. Mineral salts
D. Rock particles
E. Water

20. A car head lamp lights up when connected to a battery. What type of energy is obtained from the battery?
A. Chemical energy
B. Electrical energy
C. Heat energy
D. Light energy
E. Potential energy

21. Which of the following statements about bacteria is true?
I. All infections are caused by bacteria
II. Most bacteria are harmless to man
III. Sterilisation does not kill bacteria

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

22. Which of the following organisms is a parasite on plants?
A. Bee
B. Butterfly
C. Capsid
D. Red ant
E. Tick

23. The main parts of the central nervous system are the
A. brain and nerves
B. spinal cord and the nerves
C. brain and the spinal cord
D. brain, the nerves and the spinal cord
E. brain, the eyes, the ears and the nerves

24. Which of the following pairs of diseases can be spread easily when food is exposed to houseflies?
A. Cholera and Guinea Worm
B. Dysentery and Malaria
C. Dysentery and Guinea Worm
D. Malaria and tuberculosis
E. Dysentery and cholera

25. Which of the following activities is a mode of transmission of AIDS?
A. Shaking hands with an infected person
B. Eating with an infected person
C. Having sex with an infected person
D. Sharing clothes with an infected person
E. Sleeping in the same room with an infected person

26. The eclipse of the moon occurs when the
A. moon and the sun are in a straight line
B. earth and the sun are in a straight line
C. sun is between the earth and the moon
D. earth is between the sun and the moon
E. moon comes between the sun and the earth

27. Spitting in public is a bad social habit because it
A. makes the environment humid
B. reduces the amount of air in the body
C. reduces the amount of water in the body
D. releases disease-causing organisms into the environment
E. reduces the amount of saliva in the mouth

28. The male sex cells in the flower are found in the
A. filament
B. ovary
C. ovule
D. pollen grains
E. stigma

29. Which of the following substances is a pollutant?
A. Domestic waste
B. Fog
C. Nitrogen
D. Oxygen
E. Treated Waste

30. Digestion of protein starts in the
A. duodenum
B. gullet
C. mouth
D. small intestine
E. stomach

31. The sun, the heavenly bodies and the planets form the
A. atmosphere
B. galaxy
C. milky way
D. solar system
E. universe

32. Which of the following practices encourages soil erosion?
A. Planting trees on bare soil
B. Clearing trees and slopes
C. Planting grasses along slopes
D. Ploughing across slopes
E. Preventing bush fires

33. Which of the following metals is an alloy?
A. Aluminium
B. Brass
C. Copper
D. Iron
E. Zinc

34. Which of the following statements about plants is true?
I. Most plants show movement
II. Green plants manufacture their own food
III. All animals depend directly on plants for food

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

35. Which of the following practices will destroy the breeding grounds of mosquitoes?
A. Sleeping in mosquito nets
B. Spraying with insecticides
C. Using insect repellent
D. Introducing fish into ponds
E. Burying all empty cans

36. A plastic pen on rubbing in the hair attracts pieces of paper. What force is responsible for the attraction?
A. Electrostatic force
B. Frictional force
C. Gravitational force
D. Magnetic force
E. Centripetal force

37. When carbon dioxide is passed through lime water
A. the lime water becomes warm
B. the lime water turns milky
C. the lime water remains clear
D. lime is produced
E. the lime water decomposes

38. Which of the following solids melts easily on exposure to sunlight?
A. Animal fat
B. Candle wax
C. Plastics
D. Rubber
E. Shea butter

39. Which of the following structures regulate the amount of light that enters the eye?
A. Choroid
B. Cornea
C. Iris
D. Lens
E. Retina

40. Leguminous crops such as beans are cultivated to
A. add humus to the soil
B. increase the nitrate contents of soils
C. add nitrogen to the soil
D. make the soil loamy
E. add protein to the soil