BECE 1994 Integrated Science Past Questions and Answers

Paper 1: Objectives

1. Which of the following substances can exist in all the three states of matter at 0°C?
   1. A. Petrol
   2. B. Palm oil
   3. C. Milk
   4. D. Alcohol
   5. E. Water
   Answer: E
2. Pluto is the darkest planet because it
   1. A. is larger than the sun
   2. B. is the largest planet
   3. C. is beyond the reach of the sun’s rays
   4. D. is smaller than the sun
   5. E. falls in the penumbra region of an eclipse
   Answer: C
3. In reproduction, the embryo can be referred to as
   1. A. an ovary
   2. B. a fertile egg
   3. C. a fertilized egg
   4. D. a placenta
   5. E. a mature ovum
   Answer: C
4. Which of the following statements about second class levers is true?
   1. A. The pivot is between the effort and the load
   2. B. The load is between the effort and the pivot
   3. C. There is no pivot
   4. D. The load is on the pivot
   5. E. The effort is between the pivot and the load
   Answer: B
5. Which of the following is not a communicable disease?
   1. A. smallpox
   2. B. chicken pox
   3. C. influenza
   4. D. pneumonia
   5. E. Tuberculosis
   Answer: D
6. When bread is chewed for a long time, it tastes sweeter because it
   1. A. is made from sugar and flour
   2. B. is digested into simple sugar
   3. C. mixes with saliva which is alkaline
   4. D. is broken into smaller pieces
   5. E. contains yeast which is sweet
   Answer: B
7. Which of the following gases is not an air pollutant?
   1. A. cigarette fumes
   2. B. carbon dioxide
   3. C. sulphur dioxide
   4. D. exhaust fumes
   5. E. carbon monoxide
   Answer: B
8. Dissolved mineral salts from the soil enter the plant by the process of
   1. A. phototropism
   2. B. transpiration
   3. C. diffusion
   4. D. osmosis
   5. E. ingestion
   Answer: C
9. Which of the following organs is the center of the Central Nervous System?
   1. A. Kidney
   2. B. Liver
   3. C. Heart
   4. D. Brain
   5. E. Lung
   Answer: D
10. Soil fertility can be conserved by all the following methods except
    1. A. mulching
    2. B. afforestation
    3. C. deforestation
    4. D. crop rotation
    5. E. green manuring
    Answer: C

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11. Which of the following insects is an agent of pollination?
    1. A. Mosquito
    2. B. Housefly
    3. C. Bee
    4. D. Ant
    5. E. Cockroach
12. During the dry season most trees shed their leaves to
    1. A. protect the tree
    2. B. avoid being pulled down by strong winds
    3. C. conserve water and nutrients
    4. D. discourage animals from eating the leaves
    5. E. reduce the loss of carbon dioxide
13. The chemical formula for sodium chloride
    1. A. Na2Cl
    2. B. NaCl
    3. C. Sn2Cl
    4. D. NaCl2
    5. E. SnCl2
14. Which of the following is the cleanest source of drinking water?
    1. A. Lake
    2. B. Stagnant water
    3. C. River
    4. D. Deep well
    5. E. Surface well
15. The edible part of the mango fruit is called
    1. A. endocarp
    2. B. drupe
    3. C. fibre
    4. D. mesocarp
    5. E. epicarp
16. Which of the following is not a characteristic of all living organisms
    1. A. Respiration
    2. B. Reproduction
    3. C. Photosynthesis
    4. D. Feeding
    5. E. Excretion
17. Which of the following conditions in a simple machine will make working difficult? When
    1. A. The load distance is equal to the effort distance
    2. B. The effort distance is twice the load distance
    3. C. The effort distance is three times the load distance
    4. D. Small effort moves through a longer distance
    5. E. The load distance is greater than effort distance.
18. . A dam for generating power is constructed across a river. What type of energy is possessed by the water behind the dam?
    1. A. Kinetic energy
    2. B. Potential energy
    3. C. Electrical energy
    4. D. Heat energy
    5. E. Light energy
19. Which of the following is a function of prop roots? They
    1. A. Store starch in the swollen branch roots
    2. B. Take in air for respiration
    3. C. Hold the plant more firmly in the soil
    4. D. Develop into storage roots
    5. E. Develop into fibrous roots
20. Which of the following living organisms is not a reptile?
    1. A. Lizard
    2. B. Tortoise
    3. C. Frog
    4. D. Snake
    5. E. Crocodile
21. The following are steps involved in how nutrients in decaying organic matter finally get to man.
    
    I. The mineral in them go into the soil
    
    II. Man goes to eat the plant food
    
    III. They dissolve in soil water
    
    IV. They are used up by plants during photosynthesis
    
    Which of the following arrangements represents the correct order in which the processes occur?
    1. A. I, II, III and IV
    2. B. I, III, IV and II
    3. C. IV, II, III and I
    4. D. II, III, I and IV
    5. E. III, IV, I and II
22. Which of the following is the energy possessed by an object placed on a table?
    1. A. Kinetic energy
    2. B. Electrical energy
    3. C. Potential energy
    4. D. Sound energy
    5. E. Heat energy
23. The change in the shape of the moon is caused by the
    1. A. clouds covering the moon surface
    2. B. earth revolving around the sun
    3. C. moon revolving around the earth
    4. D. sun revolving around the moon
    5. E. earth rotating on its axis
24. The most sensitive region of the eye to light rays is the
    1. A. retina
    2. B. pupil
    3. C. cornea
    4. D. iris
    5. E. lens
25. Digestion is a process by which food is
    1. A. transported in soluble form within the body of animals
    2. B. broken down into tiny pieces in the mouth
    3. C. moved through the alimentary canal
    4. D. broken down to produce energy, water and carbon dioxide
    5. E. broken down into forms which can be easily absorbed
26. Which of the following processes is not a physical change
    1. A. Dissolution
    2. B. Melting
    3. C. Boiling
    4. D. Evaporation
    5. E. Burning
27. Which of the following is used to measure the potential difference across a resistor in an electrical circuit?
    1. A. A galvanometer
    2. B. A rheostat
    3. C. A meter bridge
    4. D. A voltmeter
    5. E. An ammeter
28. There are thick forests in some parts of the world because the climate there is
    1. A. Warm and dry
    2. B. Cool and dry
    3. C. Hot and dry
    4. D. Cool and wet
    5. E. Hot and wet
29. Which of the following practices encourages soil erosion?
    1. A. Planting cover crops
    2. B. Mulching
    3. C. Contour ridging
    4. D. Crop rotation
    5. E. Ploughing along the slope
30. A car battery produces electrical energy from
    1. A. Chemical energy
    2. B. Sound energy
    3. C. Kinetic energy
    4. D. Heat energy
    5. E. Potential energy
31. Which of the following substances is not found in the excretory products of man?
    1. A. Ammonium salt
    2. B. Common salt
    3. C. Glucose
    4. D. Water
    5. E. Carbon dioxide
32. Which of the following processes can be used to obtain local gin from palm wine?
    1. A. Evaporation
    2. B. Condensation
    3. C. Distillation
    4. D. Filtration
    5. E. Sublimation
33. The linear sequence of living things feeding and being fed on is called
    1. A. linear feeding
    2. B. food chain
    3. C. photosynthesis
    4. D. nutrition
    5. E. transpiration
34. Which of the following organisms causes malaria?
    1. A. Tsetsefly
    2. B. Fungi
    3. C. Virus
    4. D. Plasmodium
    5. E. Bacteria
35. The male and female sex cells of a plant are respectively in the
    1. A. Sperm and egg
    2. B. Pollen grain and ovary
    3. C. Sperm and ovary
    4. D. Ovary and ovule
    5. E. Embryo and seed
36. Which of the following preventive measures is not used in the control of tuberculosis?
    1. A. Isolating the patient
    2. B. Spitting carelessly in the environment
    3. C. Keeping separate cutlery, plates, cups for the patient
    4. D. Vaccinating young babies with BCG vaccine
    5. E. Spitting into a container partly filled with disinfectant
37. . During an eclipse of the sun, the region that has total darkness is known as
    1. A. umbra
    2. B. orbit
    3. C. penumbra
    4. D. shadow
    5. E. satellite
38. Animals that live in grasslands include
    1. A. lions and giraffes
    2. B. monkeys and tigers
    3. C. antelopes and hares
    4. D. woodpeckers and baboons
    5. E. elephants and leopards
39. Which of the following are products of respiration?
    1. A. Glucose and oxygen
    2. B. Waste food, energy and carbon dioxide
    3. C. Energy, carbon dioxide and water
    4. D. Energy, oxygen and water
    5. E. Carbon dioxide and oxygen
40. Which of the following living things hide during the sunny days in order to conserve water in its body?
    1. A. Rat
    2. B. Lizard
    3. C. Butterfly
    4. D. Toad
    5. E. Bat

Paper 2: Theory

1. (a) Distinguish between the following terms: (i) Physical change and chemical change (ii) Solution and suspension
   
   (b) Classify the following as either a physical or chemical change:
   
   (i) Common salt in water
   
   (ii) Burning of charcoal
   
   (iii) Melting of ice
   
   (iv) Hydrochloric acid in sodium hydroxide solution
   
   (c) (i) What is a parasite? (ii) Give two examples of parasites and their hosts.
   
   (d) Give the chemical symbols of the following elements:
   
   (i) Oxygen
   
   (ii) Chlorine
   
   (iii) Aluminium
   
   (iv) Calcium
   
   (e) (i) Explain the term self-pollination
   
   (ii) Name four agents of pollination
   
   (iii) State the function of the brightly coloured petals in insect pollination
2. (a) (i) Explain the term digestion
   
   (ii) State the end products of digestion of each of the following food substances:
   
   α) carbohydrates
   
   β) proteins
   
   γ) fats and oils
   
   (iii) Name the enzyme present in saliva and state its function
   
   (b) (i) By what process does the heat of the sun reach the earth?
   
   (ii) An aluminium bowl placed on a table is filled with hot water. Name the processes by which heat is lost by the bowl.
   
   (iii) Give one reason why wood is used as a handle for some cooking utensils.
   
   (c) List separately the vegetative parts and reproductive parts of a flowering plant
   
   (d) (i) What are alloys?
   
   (ii) Give two examples of alloys and state their constituents
3. (a) (i) Explain the term friction
   
   (ii) Give two methods of reducing friction
   
   (iii) A rigid bar is used to lift a stone:
   
   α) Draw a diagram showing the effort, pivot and load positions
   
   β) If the length of the bar is 100 cm and the pivot is placed 80 cm from the effort, calculate the load distance
   
   (b) (i) Explain the term excretion
   
   (ii) State the organs in human beings which excrete the following waste products:
   
   α) Sweat
   
   β) Carbon dioxide
   
   γ) Urine
   
   (c) (i) What is a food chain?
   
   (ii) Draw a food chain using the following organisms: Hawk, cassava leaf, lizard and grasshopper
   
   (d) State three conditions necessary for the germination of seed.
   
   (e) (i) Name two diseases which can be transmitted sexually
   
   (ii) Give two features which can be passed on from parents to children
4. (a) (i) List the planets of the solar system in order, starting with the planet nearest the sun
   
   (ii) State one difference between the eclipse of the sun and the eclipse of the moon.
   
   (b) (i) Define the term force
   
   (ii) State three types of force
   
   (iii) A box is pulled by a force of 20 N through a distance of 8 m along a smooth floor. Calculate the work done by the force.
   
   (c) Draw simple electrical circuits showing the following arrangements:
   
   (i) A switch and a light bulb in series with two dry cells in series
   
   (ii) A switch and a light bulb in series with two dry cells in parallel
   
   (d) Name two diseases that can be controlled by immunization

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