BECE 2018 Integrated Science Past Questions and Answers

Paper 1: Objectives

1. The space occupied by matter is its
   1. A. area
   2. B. mass
   3. C. volume
   4. D. weight
   Answer: C
2. Which of the following structures contain cellulose?
   1. A. Cell wall
   2. B. Cell membrane
   3. C. Chloroplast
   4. D. Mitochondrion
   Answer: A
3. Which of the following activities are cultural practices used in tomato cultivation?
   
   I. Pest control
   
   II. Picking out
   
   III. Fertilizer application
   1. A. I and II only
   2. B. I and III only
   3. C. II and III only
   4. D. I, II and III
   Answer: B
4. The farming system that makes effective use of available soil nutrients in a growing season is
   1. A. crop rotation
   2. B. land rotation
   3. C. mixed cropping
   4. D. mixed farming
   Answer: A
5. Which of the following members in a food chain will receive the least energy?
   1. A. Lizard
   2. B. Grass
   3. C. Grasshopper
   4. D. Hawk
   Answer: D
6. Digestion of fats and oils in humans starts in the
   1. A. colon
   2. B. gullet
   3. C. mouth
   4. D. duodenum
   Answer: D
7. What is the chemical symbol for silver?
   1. A. Ag
   2. B. Au
   3. C. Si
   4. D. S
   Answer: A
8. The process by which gas changes to liquid is known as
   1. A. melting
   2. B. evaporation
   3. C. condensation
   4. D. boiling
   Answer: C
9. Which of the following substances is acidic?
   1. A. Wood ash
   2. B. Salt-petre
   3. C. Bee strings
   4. D. Bicarbonate of soda
   Answer: C
10. The basic unit of life is the
    1. A. cell
    2. B. nucleus
    3. C. organ
    4. D. tissue
    Answer: A

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11. Useful materials in food that provide growth and repair of worn out tissues are called
    1. A. carbohydrates
    2. B. vitamins
    3. C. proteins
    4. D. fats
12. In human reproduction, the sperm fertilizes the female egg to form the
    1. A. zygote
    2. B. follicle
    3. C. ovary
    4. D. ovum
13. A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred. Solid X could be said to be
    1. A. an acid
    2. B. an alkali
    3. C. a base
    4. D. a salt
14. A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred. Liquid Y is
    1. A. an acid
    2. B. an alkali
    3. C. a base
    4. D. a metal
15. A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred. If red litmus paper is placed in liquid Y, the colour of the paper will
    1. A. remain the same
    2. B. change to blue
    3. C. change to purple
    4. D. become brighter
16. The type of soil which becomes water-logged after rainfall is made up of a large amount of
    1. A. silt
    2. B. sand
    3. C. gravel
    4. D. clay
17. Ringworm is a disease which attacks the
    1. A. skin
    2. B. lungs
    3. C. liver
    4. D. kidneys
18. The most appropriate method to adopt when growing vegetables in the dry season is
    1. A. watering
    2. B. transplanting
    3. C. pest control
    4. D. fertilizer application
19. Which of the following organisms improves soil fertility?
    1. A. Caterpillar
    2. B. Millipede
    3. C. Nematode
    4. D. Rat
20. The introduction of natural enemies to control pests on a field is a
    1. A. physical control method
    2. B. cultural control method
    3. C. chemical control method
    4. D. biological control method
21. A body has a density of 30gcm-3 and a volume of 6cm3. Determine the mass of the body.
    1. A. 180.0g
    2. B. 24.0g
    3. C. 5.0g
    4. D. 0.2g
22. The force which tends to pull an object in a circular motion towards the centre of the circle is called
    1. A. Centripetal force
    2. B. Electrostatic force
    3. C. Gravitational force
    4. D. Magnetic force
23. The swollen shoot disease of cocoa is caused by
    1. A. Fungus
    2. B. Virus
    3. C. Bacteria
    4. D. Protozoa
24. The instrument used to measure atmospheric pressure is called
    1. A. Thermometer
    2. B. Force meter
    3. C. Barometer
    4. D. Anemometer
25. The systematic name of NO2 is
    1. A. Nitrogen oxide
    2. B. Nitrogen (I) oxide
    3. C. Nitrogen (II) oxide
    4. D. Nitrogen (IV) oxide
26. Which of the following simple machines is a second-class lever?
    1. A. Bottle top opener
    2. B. Claw hammer
    3. C. Fishing rod
    4. D. Pair of pliers
27. A cylinder metal has a radius of 7cm and a height of 2cm. Determine the volume of the cylinder. [Take π = 3.143]
    1. A. 44cm3
    2. B. 107cm3
    3. C. 308cm3
    4. D. 1078cm3
28. Which of the following statements are true of compounds?
    
    I. They are homogenous
    
    II. Their constituents are present in fixed ratio by mass
    
    III. Their constituents keep their individual properties
    1. A. I and II only
    2. B. I and III only
    3. C. II and III only
    4. D. I, II and III
29. Which of the following factors contribute to early parenthood?
    
    I. Illiteracy
    
    II. Poverty
    
    III. Peer pressure
    
    IV. Lack of parental care
    1. A. I and II only
    2. B. II and III only
    3. C. III and IV only
    4. D. I, II, III and IV
30. Which of the following statements about the negative use of Science and Technology is correct? It
    1. A. Promotes good health
    2. B. Promotes easy communication
    3. C. Enables humans to use less energy in working
    4. D. Creates things that are dangerous to the environment
31. Which of the following nutrients is needed by plants in small quantities?
    1. A. Calcium
    2. B. Iron
    3. C. Potassium
    4. D. Magnesium
32. Which of the following statements about shadow formation is correct? It shows that light rays can
    1. A. Be diffused
    2. B. Travel in a straight line
    3. C. Be refracted
    4. D. Be reflected
33. The colour of the neutral wire in an electrical circuit is
    1. A. Blue
    2. B. Brown
    3. C. Green
    4. D. Yellow
34. A metal displaces 5.0cm3 of water when it is totally immersed. If the mass of the metal is 35.0g, calculate its density.
    1. A. 7.0gcm-3
    2. B. 30.00gcm-3
    3. C. 40.00gcm-3
    4. D. 175.00gcm-3
35. Which of the following physical properties of water are correct? Water
    
    I. is a colourless liquid
    
    II. is a universal solvent
    
    III. boils at 100°C at standard atmosphere pressure
    
    IV. has a density of 5kgcm-3 at 4°C
    1. A. I and II only
    2. B. II and III only
    3. C. I, II and III only
    4. D. II, III and IV only
36. The relative proportions of the different particle sizes in a soil sample refer to soil
    1. A. Temperature
    2. B. Texture
    3. C. Structure
    4. D. Porosity
37. Which of the following chemical equations is balanced?
    1. A. K + O2 → K2O
    2. B. Mg + O2 → MgO
    3. C. Na + Cl2 → NaCl
    4. D. H2 + Cl2 → 2HCl
38. Heat is transferred along an iron bar by
    1. A. Absorption
    2. B. Conduction
    3. C. Convection
    4. D. Radiation
39. The second stage in the life cycle of a mosquito is the
    1. A. Egg
    2. B. Imago
    3. C. Larva
    4. D. Pupa
40. The function of the platelets in the circulatory system of humans is to
    1. A. Transport oxygen
    2. B. Transport carbon dioxide
    3. C. Defend the body
    4. D. Clot the blood

Paper 2: Theory

1. (a) The diagram below is an illustration of a fish.
   
   
   
   (i) Identify the fish.
   
   (ii) Name each of the parts labeled I, II, III, V.
   
   (iii) Name the habitat of the fish.
   
   (iv) Explain how each of the parts labeled III and VI enables the fish to adapt to its habitat.
   
   (b) The diagram below is an illustration of a section through the soil.
   
   
   
   (i) What does the diagram represent?
   
   (ii) Name each of the parts labeled I, II, III, IV.
   
   (iii) Which part of the diagram:
   
   α) is the richest in humus?
   
   β) is the habitat for soil organisms?
   
   γ) undergoes weathering?
   
   (iv) What is the effect of heavy rainfall on the part labeled I?
   
   (c) The diagram below is an illustration of an electrical circuit.
   
   
   
   (i) Name each of the parts labeled I, II, IV, VI.
   
   (ii) State the energy transformation that takes place in:
   
   α) I
   
   β) IV
   
   (iii) State the S.I units of the quantity measured by each of the parts labeled:
   
   α) III
   
   β) V
   
   (iv) State the function of the part labeled VI.
   
   (d) In an experiment, equal volumes and equal concentrations of dilute hydrochloric acid and dilute sodium hydroxide solutions were each placed in different test tubes.
   
   (i) Explain briefly how you can identify each of the solutions
   
   α) Hydrochloric acid
   
   β) Sodium hydroxide
   
   (ii) State the type of reaction that occurred when the two solutions were mixed.
   
   (iii) What type of solution was formed when the reaction occurred?
   
   (iv) State what would be observed when both red and blue litmus papers were dipped into the third solution.
   
   (v) Explain how the solid portion of the solution could be obtained.
2. (a) (i) What is an ion?
   
   (ii) State two methods of softening hard water.
   
   (b) (i) Differentiate between pest and parasite in agriculture.
   
   (ii) Give an example each of a pest and a parasite.
   
   (c) (i) What is work?
   
   (ii) A force of 10N causes a body to move a distance of 5.2m. Calculate the work done.
   
   (d) Name two diseases associated with the circulatory system of humans.
3. (a) (i) What is malnutrition?
   
   (ii) State one symptom each of scurvy and rickets.
   
   (b) Draw the potassium atom and show the electron distribution [K = 19].
   
   (c) (i) Define potential energy.
   
   (ii) An object of mass 10kg is moving at 2ms-1. Calculate its kinetic energy.
   
   (d) State one example each of macro and micro nutrients.
4. (a) (i) Define hazard.
   
   (ii) List two safety precautions in science labs.
   
   (b) State three differences between osmosis and diffusion.
   
   (c) (i) What is weather?
   
   (ii) State two differences between weather and season.
   
   (d) (i) Define fertile soil.
   
   (ii) State two factors that cause loss of soil fertility.
5. (a) (i) Define magnetic field.
   
   (ii) Name two methods of making magnets.
   
   (b) Explain teenage pregnancy.
   
   (c) Write the formula for each compound:
   
   (i) calcium chloride
   
   (ii) copper (I) oxide
   
   (iii) nitrogen (IV) oxide
   
   (iv) ammonia
   
   (d) (i) List three physical properties of soil.
   
   (ii) What is the texture of clayey soil?
6. (a) (i) What are derived quantities?
   
   (ii) State the S.I units of:
   
   α) area
   
   β) volume
   
   (b) (i) State two factors necessary for photosynthesis.
   
   (ii) Explain the functions of each factor.
   
   (c) Explain:
   
   (i) Soft water
   
   (ii) Hard water
   
   (d) State three reasons why some seeds are nursed.

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