Integrated Science WASSCE 2023 Past Questions

Each question in this Integrated Science WASSCE 2023 Past Questions is followed by four options lettered A to D. Find the correct option for each question and shade in pencil on your answer sheet, the answer space which hears the same letter as the option you have chosen.
Think carefully before you shade the answer spaces; erase completely any answers you wish to change. Now, answer the following questions.

1. The existence of two or more compounds of the same molecular formula but different arrangements of carbon atoms in a compound is termed.

• A. allotropy.
  B. isomerism.
  C. isotopy.
  D. polymerization.

2. The instrument most suitable for measuring the diameter of a flute is

• A. metre rule.
  B. vernier calipers.
  C. micrometer screw gauge.
  D. tape measure.

3. Which of the following scientists is associated with binomial system of classification?

• A. Aristotle
  B. Linnaeus
  C. Mendel
  D. Mendeleev

4. The removal and replanting of seedlings in a nursery is known as

• A. thinning.
  B. pricking out.
  C. transplanting.
  D. hardening off

5. The westerlies are winds that blow

• A. from the poles.
  B. towards the equator.
  C. towards the poles.
  D. from the equator

6. In humans, the sex of a baby is determined by the chromosomes in

• A. the egg cell.
  B. the sperm cell. ‘.
  C. both egg cell and sperm cell.
  D. neither egg cell nor sperm cell

7. An atom of element Y has 18 electrons and mass number 40. What is the neutron number of the element?

• A. 18
  B. 22
  C. 40
  D. 58

8. One advantage of removing excess water from the soil is to-improve on the

• A. soil structure.
  B. soil texture.
  C. soil aeration.
  D. soil acidity

9. The current in a circuit is 12.5 A. If the resistance in the circuit is 30 0, determine the potential difference across the resistor

• A. 0.42 V
  B. 2.40 V
  C. 42.50 V
  D. 375.00 V

10. The main reason why it is necessary to heat a leaf in ethanol before it is tested for starch is to

• A. soften the leaf.
  B. harden the leaf.
  C. kill the cells of the leaf.
  D. remove the chlorophyll.

11. Which of the following pairs of crops are recommended to be grown on ridges?

• A. Tomato and okro
  B. Cassava and groundnut
  C. Okro and groundnut
  D. Groundnut and yam

12. The IUPAC name of H S0 is

• A. hydrogen tetraoxosulphate (VI) acid.
  B. hydrogen tetraoxosulphate (IV) acid.
  C. hydrogen trioxosulphate (IV) acid.
  D. hydrogen trioxosulphate (VI) acid

13. A motor cyclist increased his speed from 50ms^-1 to 150 ms^-1 in 10 s. Determine the acceleration of the cyclist.

• A. l0ms^-2
  B. 15ms^-2
  C. 20ms^-2
  D. 25ms^-2

14. When a pen is rubbed through hair,
    I the hair becomes negatively charged.
    II the pen becomes negatively charged.
    III the pen becomes positively charged.
    IV the hair becomes positively charged.
    Which of the statements above is/are correct?

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

15. The structure on which the image of an object is formed in the eye is the

• A. lens.
  B. pupil.
  C. retina.
  D. vitreous humour.

16. Treatment of water could be done by
    I sedimentation.
    II filtration.
    III adding chlorine

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

17. A hand trowel is used mainly for

• A. harvesting.
  B. clearing bush.
  C. stirring beds.
  D. transplanting seedlings.

18. One function of the axial skeleton of mammals is the

• A. production of red blood cells.
  B. production of white blood cells.
  C. storage of calcium.
  D. protection of the spinal cord.

19. A strong base normally

• A. has a low concentration of water.
  B. has a high concentration of water.
  C. gives high concentration of hydroxide ions in solution.
  D. gives high concentration of hydrogen ions in solution.

20. Which of the following farm implements is used for breaking down lumps of soil?

• A. Cultivator
  B. Harrow
  C. Plough .
  D. Subsoiler

21. The general term used to describe the process in which metal is tarnished through a chemical reaction is

• A. alloying.·
  B. galvanization.
  C. corrosion.
  D. Electroplating

22. Gold is used as a jewel because

• A. it has high refractive index.
  B. Of its high density.
  C. it is yellow.
  D. of its scarcity

23. ln an N-P N transistor, the charges that move from the emitter into the base are called?

• A. electrons.
  B. holes.
  C. neutrons.
  D. protons.

24. Which of the following devices makes use of pressure to enable it function properly?

• A. Beaker
  B. Conical flask
  C. Measuring cylinder.
  D. Pipette

25. Which of the following substances is a raw material for photosynthesis?

• A. Carbon (IV) oxide
  B. Chlorophyll
  C. Glucose
  D. Oxygen

26. The preparation of vegetable beds starts with

• A. Levelling of the top soil.
  B. spreading of manure
  C. finning the sides of the bed;·
  D. loosening up of the top soil to a desired height

27. The layer of the atmosphere characterized by a few clouds, presence of ozone and rising temperature with altitude is known as

• A. mesosphere
  B. stratosphere
  C. thermosphere
  D. troposphere

28. The blood cells that defend the body against infection by engulfing gems are the

• A. erythrocytes.
  B. lymphocytes.
  C. phagocytes.
  D. thrombocytes.

29. The pressure at a depth h below the surface of the sea is 105 Pa. If the density of sea water is 1030 kg m-3, determine h [g=l0ms-2]

• A. 0.97m
  B. 9.70 m
  C. 0.0103m
  D. 0.103m

30. Disadvantages of producing vegetables on large scale include
    I high incidence of pests.
    II high cost of irrigation.
    III scarcity of agrochemicals.

Which of the statements above are correct?

• A. I and II only
  B. I and Ill only·
  C. II and III only
  D. I, II and III

31. Which of the following levels of a food chain has the highest number of organisms?

• A. Primary consumers
  B. Producers
  C. Decomposers
  D. Secondary consumers

32. Which of the following phenomena is affected by the moon?

• A. Earthquake
  B. Sea breeze
  C. Tide
  D. Volcano

33. Greenhouse gases include
    I. carbon (IV) oxide.
    II. carbon (II) oxide.
    III. methane

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

34. Acquired characteristics in humans are

• A. inherited from parents.
  B. caused by the environment.
  C. examples of genetic variation.
  D. passed onto offspring.

35. Which of the following features are associated with lightning arrestors? They are
    I. made of copper.
    II. buried into the ground.
    III. mounted at the highest points of a building.

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

36. The ion which can cause permanent hardness in water is

• A. Mg2+
  B. Na+.
  C. K+.
  D. Al3+

37. Steel is preferred to pure iron for constructional work because

• A. steel is cheaper than iron.
  B. steel is malleable while iron is brittle.
  C. iron poses more health hazards than steel.
  D. steel is lighter than iron

38. A homozygous black rabbit is mated with a white rabbit. If black is dominant to white colour, what colour would the offspring be?

• A. All would be black
  B. All would be white
  C. Some would be black and some would be white
  D. They would be partly black and partly white

39. Which of the following practice best protects the soil against erosion?

• A. Good spacing of crops
  B. Green manuring
  C. Earthling-up
  D. Mulching

40. An electric stove is rated 750 W. Determine the amount of energy it dissipates when it works for 40 minutes.

• A. l.8 x 106 J
  B. 3.0 x 104J
  C. 1.85 x 106 J
  D. 7.9xl05J

41. The chemical reaction HNO3 + NaOH → NaNO3 + H2O Is an example of

• A. double decomposition reaction.
  B. direct combination reaction.
  C. neutralization reaction.
  D. Dissociation reaction

42. The disorder of the brain in which a person becomes extremely unhappy and has no enthusiasm for anything is known as

• A. anxiety.
  B. depression.
  C. Phobia
  D. Psychosis

43. An insect pest that makes tunnels into the tuber of yam is

• A. mealy bug.
  B. millipede.
  C. thrips.
  D. weevil.

44. Which of the following statements about parallel electric circuit are correct?
    I. The currents in the two parallel parts are the same.
    II. The currents in the two parts are different.
    III. The voltage across the two parallel components are the same.

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

45. The most important aim of crop rotation is to

• A. prevent soil erosion
  B. slow down rate of evaporation of water.
  C. make efficient use of nutrients.
  D. prevent weed growth.

46. Which of the following steps should be taken in giving first aid to a person who falls and faints in a slippery bathroom?

• A. Check for cuts, bandage them and send the person to hospital
  B. Wash the person’s face with cold water and look for fan to blow air over the person
  C. Put the person on his/her side. provide enough ventilation and call for help
  D. Run and call the nearest nurse to give some drugs

47. The chemical equation Fe₂O₃ + 2H₂O → 2FeO₃ + 3H₂O illustrates a process in chemical weathering called

• A. carbonation.
  B. hydration.
  C. hydrolysis.
  D. oxidation

48. Which of the following characteristics of ionic compounds are correct?
    I High melting point
    II High solubility in water
    III Low melting point
    IV High electrical conductivity in solution

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

49. Grading as used for agricultural produce means

• A. sorting of produce according to size and colour.
  B. heaping of harvested crops on the farm.
  C. packing produce for marketing.
  D. labelling produce with their individual prices.

50. The unit of quantity of electricity is

• A. ampere.
  B. coulomb.
  C. ohm.
  D. volt.

Integrated Science WASSCE 2023 Past Questions Section B

All questions carry equal marks.

1. (a) (i) Name three main components of a simple electric circuit
   (ii) Give one function each of the components named in (i).

(b) Consider the following elements; Nitrogen, Sulphur, Potassium, Silicon and Lithium. List the element(s) that i /are:

1. metal(s);
2. non-metal(s);
3. semi-metal(s).

(c)       (i)       Describe briefly how metamorphic rocks are formed.

            (ii)      Give two characteristics of metamorphic rocks

(d) (i) What is a specialized cell?
(ii) State one function each of the following specialized cells:
(a.) human sperm cell;
(b) red blood cell.

2. (a) (i) What is a fertile soil?
   (ii) State three ways by which an infertile soil on a maize farm could be restored.
   (b) (i) State the S.I unit of each of the following quantities:
   (a.) loudness of sound;
   (b) Electric energy consumed;
   (c) Current flowing in a circuit.
   (ii) Give one practical use of each of the following materials:
   (a) insulator;
   (b) Rheostats.

(c) (i) Name the two major parts that constitute the axial skeleton of a mammal. (ii) Name three organs that are protected by bones. (d) (i) What is an alloy? (ii) List three household items that are made from an alloy

3. (a) (i) What is a complete flower?
   (ii) Name three parts of a flower that are not essential for reproduction.

(b) Give two examples each of the following types of substances
(i) Toxic substance;
(ii) Inflammable substance;
(iii) Corrosive substance

(c) (i) What is the weight of a body?

(ii) A body of mass 65 kg is weighed on a spring balance. Calculate the weight of the body [g= 10ms^-2]

(d) State four ways of controlling rodents on a cassava farm.

4. (a) (i) Distinguish between hypogeal germination and’ epigeal germination.
(ii) Name three environmental conditions necessary for seed germination.
(b) (i) What is hard water?

(ii) Explain one of the ways in which each of the following stages is important in large scale water treatment.
(a) aeration;
(b) flocculation;
(c) sedimentation

(c) (i) State three features of a fuse wire
(ii) State two ways in which a fuse wire is important in household wiring.

(d) (d) Give two reasons for undertaking each of the following farm practices:
(i) pricking-out;
(ii) thinning-out;
(iii) Supplying.

5. (a) (i) State two differences between respiration and photosynthesis
(ii) Give two uses of energy in the body of humans
(iii) State two industrial uses of anaerobic respiration

(b) (i) List the three modes of heat transfer
(ii) Explain each of the modes of heat transfer listed in (i).

(c) (i) Distinguish between dilute acid and concentrated acid.
(ii) A solution of 0.25 Mol dm-3 of NaOH is to be prepared in the laboratory. Calculate the mass of NaOH needed for the preparation. [ Na= 23.0, O = 16.0, H = 1.0]

(d) (i) What is a brooder house?

(ii) Give one reason for providing each of the following materials in a brooder house:
(a) floor litter;
(b) source of light

6. (a) (i) State three differences between organic compounds and inorganic compounds.
(ii) List two properties of carbon that enables it to form many stable compounds.

(b) State five effects of climate change on humans.
(c) Give a term to represent each of the following practices used in animal production:

i. making a mark on a part of an animal for easy recognition;
ii. removing the tail of an animal;
iii. isolating sick animals from the healthy ones;
iv. separating the young animals from the mother;
v. giving feed rich in nutrients to female animals before being serviced.

(d) (i) What is dispersion of light?
(ii) With the aid of a triangular glass prism, illustrate the dispersion of light.

BECE Integrated Science 2024 Past Questions