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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2024

OBJECTIVE TEST

Objective Test

Question 1

Which of the following sources of energy is non-renewable? I. Coal II. Solar III. Wind IV. Uranium-236

Question 2

The building block of a material with the smallest unit of matter that retains the properties of an element is

Question 3

Oil from a mechanic workshop accidentally spilled into a pool of water which was breeding mosquitoes. After some time, the pool of water was no longer breeding mosquitoes. Which control method may have been deployed?

Question 4

Grasshopper management is crucial because of all the following reasons except

Question 5

A hunter experiences a backward force upon firing a gun. Which of Newton's laws of motion is demonstrated in the situation?

Question 6

Which of the following sets of devices operate on the principle of magnetism?

Question 7

Which of the following elements has four electron shells?

Question 8

A livestock farmer wants to achieve good health for animals being reared. Which of the following activities should be undertaken by the farmer? I. Have vaccination schedules for the animals II. Provide balanced ration to the animals III. Provide good sanitation for the animals

Question 9

Canned foods and drinks have expiry dates on them. The hazard involved in taking an expired drink is

Question 10

Two unknown solutions labelled A and B were brought to a JHS 3 class. It was observed that in solution A, red litmus paper changed colour to blue, while in solution B, red litmus paper retained its colour. What could be the content of solution A?

Question 11

A student who complained of stomach upset was given first aid with Mg(OH)2 boldly written on it. What could be the common name of the first aid the student was given?

Question 12

A bowl of water on a gas stove was initially cold. It became warm after some time. What was the mode of heat transfer in the water?

Question 13

The portion of air which acts as a solvent is

Question 14

A natural phenomenon that illustrates the dispersal of light is

Question 15

When a stick is dipped into a pool of water, it appears to

Question 16

Which of the following electrical appliances can convert electrical energy to heat energy? I. Electric iron II. Kettle III. Water heater

Question 17

The consequences of the greenhouse effect on humans include I. flooding of coastal cities II. desertification of fertile areas III. increased number of storms IV. increased use of fossil fuels

Question 18

Cockroaches in a cupboard were killed after an insecticide had been sprayed. The insecticide reached the cockroaches by the process of

Question 19

Which of the following nursery beds is suitable for a flood-prone area?

Question 20

Which of the following natural cycles directly involves the sun? I. Carbon cycle II. Water cycle III. Nitrogen cycle

Question 21

The primary purpose of respiration in man is I. take in oxygen. II. release carbon dioxide. III. regulate body temperature.

Question 22

Nitrogen deficiency in soils causes

Question 23

An electric bulb is rated 0.5 A, 120 V. Determine the power produced when the bulb is turned on.

Question 24

The following processes are chemical changes except

Question 25

Which of the following statements best describes the term green economy? It includes

Question 26

The energy transformation that occurs when sodium hydroxide is dissolved in water is

Question 27

Digestion of rice in humans starts from the

Question 28

A substance that could be used in large scale treatment of domestic water is

Question 29

Chlorophyll helps plants absorb energy from the sun as they undergo the process of photosynthesis. It is located in a structure called

Question 30

An electrical engineer was in your school to replace a 20 W bulb with a 50 W bulb. Use this information to answer the question below The unit inscribed on the bulb measures its

Question 31

An electrical engineer was in your school to replace a 20 W bulb with a 50 W bulb. Use this information to answer the question below The 50 W bulb is likely to I. increase the brightness in the room. II. increase the amount of electricity consumed. III. destroy the habitat of pests.

Question 32

The following devices work based on the principle of pressure in fluids except

Question 33

In making ornaments and jewellery, non-reactive metals are preferred because they

Question 34

A metallic saddle was left in a boiling soup. After some time, the handle became hot. This is because the particles in the saddle

Question 35

The simplest way of making well water suitable for laundry is by

Question 36

A poultry farmer observed that the layers were producing thin-shelled eggs. Use this information to answer the question below The defect identified is mostly caused by a deficiency in

Question 37

A poultry farmer observed that the layers were producing thin-shelled eggs. Use this information to answer the question below What ingredient could be added to the feed to correct the defect?

Question 38

Which of the following pairs of energy sources is environmentally friendly?

Question 39

A student is to measure 20 cm3 of a sodium hydroxide solution. What instrument could be used?

Question 40

A mother took her child to the hospital and upon investigation, it was noticed that the child's diet was lacking in zinc. What could this result in? I. Decreased growth in the child II. Anaemia and constipation III. Inability of the body to fight infection

THEORY

ESSAY

This paper is in two parts: I and II. Answer Question 1 in part I and any other four question in part II

Question 1

Theory question 1 diagram
  1. Fig. 1(a) is an illustration of the longitudinal section of the mammalian heart. Study it carefully and answer the questions that follow. State one function for each of the parts labelled I, II, IX, and X. Explain briefly why the left lower part of the heart has a thicker muscle. State two ways by which the flow of blood to and from the mammalian heart as shown in Fig 1(a) can be kept at acceptable levels. Name two parts of the heart where oxygenated blood can be found.
  2. Fig. 1(b) is an illustration of three sets of plant parts labelled P(maize grains), Q(tomato seedlings) and R(cassava cutting). Study it carefully and answer the questions that follow. Describe briefly how each of the parts labelled P, Q, and R are planted on a seedbed. State four conditions under which R can be cultivated to produce a high yield.
  3. Fig. 1(c) is an electric circuit diagram Study it carefully and answer the questions that follow. State one function for each of the parts labelled I, II, III, and IV. If the voltmeter reads 2.4 V and the ammeter reads 0.8 A when the circuit is closed, calculate the value of the part labelled IV. State one way of conserving the value of the part labelled I in the circuit. State two observations that can be made when the circuit is closed.
  4. Fig. 1(d) illustrates an experiment performed to separate the components of a mixture. Study it carefully and answer the questions that follow. Describe briefly the process of this experiment. State one function for each of the parts labelled II and IV. State two precautions that should be taken to obtain reliable results when performing this experiment.

PART I [40 marks]

Answer all of Question 1

Questions for this section are in the printed paper.

PART II [60 marks]

Answer three questions only from this section

Question 1

Theory question 1 diagram
  1. Given a flashlight, a tennis ball, and a screen, draw a diagram to show how a shadow can be formed. A student seeking to determine the volume of an irregular body of mass 4 kg used a graduated cylinder in an experiment. Fig. 2 illustrates two key stages of the experiment where A indicates a setup before the irregular body was immersed and B indicates the same setup after the irregular body was immersed. Determine the density of the irregular body. State two precautions that must be taken to obtain reliable results.
  2. State three safety precautions to prevent accidents during the use of liquefied petroleum gas in the home.
  3. Explain briefly the scientific principle underlying each of the following waste management practices: Composting; Recycling; Incineration.
  4. The digestive system of two domestic animals was provided. One is that of a goat and the other is that of a rabbit. Outline three features that would help to differentiate between the two digestive systems.

Question 2

  1. You have been given maize, cowpea, cassava, and cabbage to cultivate on a piece of land using a crop rotation system. Design a 4-year rotational program using the given crops. Give two reasons for the sequence given in (a)(i).
  2. A student is suspected of having contracted COVID-19. Give three symptoms that the student may exhibit to confirm this suspicion. Suggest two ways to prevent the spread of COVID-19 in the school. Give two reasons why COVID-19 was declared a pandemic.
  3. The mass of a vehicle is 1000 kg and it travels at 100 m/s. If the vehicle accelerates to 150 m/s in 10 s, calculate the: acceleration of the vehicle; force that acts on the vehicle; final momentum when the vehicle comes to a stop.

Question 3

Theory question 3 diagram
  1. A student who went to bed immediately after eating complained of stomach upset the next morning. A doctor prescribed a liver salt, whose major composition is NaHCO3 as the medication. Using a balanced chemical equation, explain how the liver salt would relieve the student from this discomfort.
  2. Fig. 4 is an illustration of a body of mass 20 kg placed on top of a wall of height 10 m. Calculate the energy of the body.
  3. Define the term light emitting diode (LED). Mention two devices that use LED in their operation.
  4. A student was tasked to prepare a raised nursery bed for nursing tomato seeds: Suggest two simple tools that could be used in the nursery bed preparation; State one function each of the tools listed in (d)(i).
  5. State three observable features of an animal cell. State two functions of a nerve cell.

Question 4

Theory question 4 diagram
  1. Fig. 5 is an electrical circuit diagram. Study it and answer the questions that follow. Calculate the effective resistance in the circuit when it is closed; Calculate the current that will flow through the circuit when it is closed.
  2. Differentiate between an organic fertilizer and an inorganic fertilizer. Outline briefly the steps involved in preparing raised beds.
  3. State one function each of the following components of blood: red blood cells; white blood cells; blood plasma. Explain briefly the impact of each of the following organisms on humans: housefly; grasshopper.
  4. Describe briefly the formation of an ammonia molecule after an interaction between 1H and 7N atoms.

Question 5

  1. State three ways by which the atmosphere in an industrial area is polluted.
  2. Write the word equation for each of the following reactions between: α) calcium and oxygen β) nitrogen and hydrogen State the hazard that could be prevented when each of the following protective materials are used in the laboratory: α) gas mask β) goggles
  3. If a cuboid of weight 100 N has sides 5 cm by 10 cm, calculate the: α) Area of the cuboid; β) Pressure exerted by the cuboid when it lies on its side.
  4. Explain the term mixed farming. State two advantages of mixed farming.