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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2012

OBJECTIVE TEST

Objective Test

Question 1

The S.I unit for measuring the work done by a force is

Question 2

The chemical formula of a compound describes the

Question 3

Which of the following life processes is represented by the equation glucose + oxygen → carbon dioxide + water + energy?

Question 4

Each layer of soil profile is known as

Question 5

When the p-n junction of a transistor is reversed biased

Question 6

When a solid-liquid mixture is filtered, the liquid that separates out into the container is called

Question 7

Which of the following processes involves the solid state of matter?

Question 8

Which of the following farming systems is most effective in maintaining soil fertility?

Question 9

The disease in humans which is associated with insufficient intake of calcium is

Question 10

The arrow in the circuit symbol of either n-p-n or p-n-p transistor is always on the

Question 11

Which of the following insect pests of crops has piercing and sucking mouthparts?

Question 12

A reflex action involves the

Question 13

The type of image formed in a plane mirror is always

Question 14

Which of the following statements about acids are correct? I. They turn red litmus paper blue II. They can be classified as either organic or mineral acids III. They can be neutralized by bases

Question 15

A transistor is said to operate in an active region when

Question 16

Tuberculosis is spread

Question 17

One function of engine oil in the engine of a tractor is to

Question 18

Black pod is a disease of

Question 19

The efficiency of a machine is always less than 100% because part of the energy input is used to

Question 20

Which of the following electronic components are used to produce oscillator circuits? I. Transistor II. Inductor III. Capacitor

Question 21

Which of the following sources of light is natural?

Question 22

Which of the following substances are carried by the blood? I. Hormones II. Urine III. Oxygen IV. Carbon dioxide

Question 23

The practice of starting new organization in response to identified opportunities is termed

Question 24

The sub-atomic particle with zero charge in the nucleus of an atoms is called

Question 25

Which of the following management practices greatly helps in record keeping?

Question 26

In a pin-hole camera, when the size of the pin-hole is increased, the image formed is

Question 27

Non-reactive metals are preferred in making ornaments and jewellery because they

Question 28

Producers in an ecosystem are plants that

Question 29

The use of resistant varieties of crop in controlling diseases is described as

Question 30

The chemical formula for aluminium oxide is represented as AlxOy. The values of x and y are respectively

Question 31

In electrical circuits, the component that protects appliances against high currents is the

Question 32

One benefit of technology to industrialization is

Question 33

Which of the following factors contribute to early parenthood? I. Poverty II. Illiteracy III. Lack of parental care IV. Peer pressure

Question 34

Which of the following examples of fertilizers improves soil texture?

Question 35

The reaction between hydrochloric acid and sodium hydroxide produces

Question 36

In modern electrical wirings the colour code for the live wire is

Question 37

An example of soil minor nutrient is

Question 38

The complete development of a human foetus in the womb normally takes

Question 39

A material that allows a small amount of light energy to pass through it but cannot be seen through is referred to as

Question 40

The leads of the transistor responsible for activation is the

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. The diagrams below are illustrations of an experiment in the laboratory using a piece of stone, a cork of mass 4.0 g and other necessary materials. The initial volume of water in A was read and noted. A string was attached to a piece of stone and the stone lowered gently into the water as shown in B. The volume was again read and noted. Finally, the cork of mass 4.0 g was attached to the stone and both materials lowered gently into the water as shown in C. The volume was read and noted. Why did the level of the water rise when the stone was lowered gently into it as shown in diagram B. Why was it necessary to attach the stone to the cork before lowering it gently into the water as shown in diagram C? What would have happened if the cork alone were lowered gently into the water? What is the volume of the stone? cork? Calculate the density of the cork. Why were the materials lowered gently into the water?
  2. A salt solution was prepared in the laboratory using the set of apparatus illustrated below. Study the illustrations carefully and used them to answer the question that follow. Name each of the apparatus labelled I, II, III, IV and V. State one function of each of the apparatus labelled I, II, III, IV and V.
  3. The diagram below is an illustration of the external features of a flowering plant. Study the diagram carefully and answer the questions that follow. Name the parts labelled I, II, III, IV, V and VI. State one function of each of the parts labelled I, II, III, V and VI. State the two main parts of a flowering plant.
  4. The diagram below is an illustration of a small farm animal. Study the set-up carefully and answer the questions that follow: Identify the animal. Name each of the parts of the animal labelled I, II, III, IV, V and VI. Name the structure in which the animal is kept. Mention three breeds of the animal. State two management practices to be adopted in order to control diseases and pests in the rearing of the animal.

PART I [40 marks]

Answer all of Question 1

Questions for this section are in the printed paper.

PART II [60 marks]

Answer all of Question 1

Question 1

  1. What is technology? State one use of technology in communication.
  2. Write and balance each of the following chemical equations: Fe + O2 → Fe2O3; Na + Cl2 → NaCl; H2 + O2 → H2O.
  3. State one function of each of the following components of a typical cell: nucleus; chloroplast; mitochondrion.
  4. Mention four cultural practices in vegetable crop production.
  5. Name two agencies in food safety and quality assurance in Ghana.

Question 2

  1. Explain why a tomato plant is likely to wilt if too much fertilizer is applied to it.
  2. Give two differences between electrical insulators and electrical conductors. State two effects of illegal electrical connections in the home.
  3. Explain each of the following terms as used to describe change of state of matter: condensation; freezing.
  4. State two diseases of the circulatory system in humans. Mention two ways in which each of the diseases you have stated in (d)(i) can be prevented.

Question 3

  1. What is a transistor? Give two uses of a transistor.
  2. Mention the suitable solvent for each of the following solutes: grease; ink stain; starch; cube sugar; oil paint; iodine.
  3. What is a respiratory organ? Name two structures of the respiratory system of humans.
  4. What is an agricultural chain? Name two types of agricultural chain.

Question 4

  1. What are stars? Arrange in order, starting from the sun, the first four planets in the solar system.
  2. State two differences between plants and animals; two similarities between plants and animals.
  3. Explain each of the following farming systems: pastoral farming; ecological farming.
  4. State the properties of water in terms of odour, taste, effect on litmus.

Question 5

  1. What are annual plants? perennial plants?
  2. Mention one danger involved in each of the following activities in the laboratory: eating or drinking water in the laboratory; washing hands with unknown liquid in a beaker; walking barefooted.
  3. What is a digestive enzyme? Give two examples of digestive enzymes in humans.
  4. Give two differences between conduction and radiation of heat.