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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2006

OBJECTIVE TEST

Objective Test

Question 1

The property of a rock that makes it different from water is that it has

Question 2

A plane mirror can be described as opaque because it

Question 3

Wood is used to make the handles of cooking utensils because it is a

Question 4

Ventilation holes are made at the upper part of a door to allow air to rise by

Question 5

When the north poles of two magnets are brought together they

Question 6

A fuse is used in an electrical circuit to

Question 7

The angle between an incident ray and a reflecting surface is 20°. Determine the angle of reflection.

Question 8

A screw is a machine which works in the same way as

Question 9

Power is defined as the rate at which

Question 10

An example of a lever in which the effort is applied at the middle is a

Question 11

A simpler way of maintaining the efficiency of a machine is by

Question 12

The part of a seed which grows to become the shoot of a plant is the

Question 13

One disease that affects the nervous system of humans is

Question 14

Which of the following life processes leads to the release of energy?

Question 15

Mineral salts in dead organisms are released into the soil by a process called

Question 16

Spectacles fitted with concave lenses are worn by people suffering from

Question 17

Which of these organs in humans releases carbon dioxide as a waste product?

Question 18

Farmers do not plant the stems of maize because the stems

Question 19

Which of the following ways of treating water makes the water soft?

Question 20

Water that needs a small amount of soap to form lather is described as

Question 21

Common salt (sodium chloride) is obtained from seawater by

Question 22

The chemical formula of a compound describes the

Question 23

Which of the following solvents can be used to remove grease from the hand?

Question 24

How many different elements are present in the compound H2SO4?

Question 25

Producers in an ecosystem are plants that

Question 26

The disease caused by the Plasmodium parasite is

Question 27

Vaccination is carried out to

Question 28

Which of the following farming practices is likely to make the soil poor in nutrients?

Question 29

The type of cloud found closest to the earth’s surface is

Question 30

The amount of water vapour in the atmosphere is called

Question 31

The planet which is farthest away from the sun is

Question 32

Which of the following gases is involved in the process of rusting?

Question 33

A non-reactive metal can be identified from other metals because its surface is

Question 34

The property to a metal that makes it possible for it to be drawn into a wire is called

Question 35

The main reason why food is processed is to make it

Question 36

The process by which kerosene rises up in the wick of a lantern is known as

Question 37

Which of the following statements about friction is not true?

Question 38

Arteries are blood vessels which carry

Question 39

Which of the following structures is not involved in blood circulation?

Question 40

A substance of mass 10 kg has a density of 2.0 kgm-3. Calculate its volume.

THEORY

ESSAY

This paper is in two sections, A and B Answer Question 1 in Section A and any other three questions in Section B. Credit will be given for clarity of expression and orderly presentation of material

Question 1

Theory question 1 diagram
  1. The diagram below shows the electrical method of magnetizing a nail. Study the diagram and use it to answer the questions that follow. Give the names of the parts of the circuit labelled I, II and III List two substances that can be made into a magnet. State two other methods of making magnets. Name one material that is used in making an electrical wire Give two properties of the material you named in (iv) which makes it useful as a wire. [10 marks]
  2. The diagram below shows the set-up for the preparation of carbon dioxide in the laboratory. Name the parts of the set-up labelled I and II Give the name of the method of gas collection shown in the diagram. Give one property of gases collected over water. What will happen if component I does not dip into the contents of the flask? List two compounds that form the content of the flask. Write down the systematic name of carbon dioxide. [10 marks]
  3. In an experiment, yam pap is put into two test tubes A and B containing iodine solution. The test tubes are warmed slightly to a temperature of 37°C and saliva is put into test tube B State the colour of the content of test tube A. State the colour changes of the contents in test tube B after about 3 minutes. Fehling’s solution is added to the contents of test tube B after the 3 minutes and it turns brick red. What food substance is present? (iv) Give two functions of saliva in eating. Why was it necessary to warm the contents of the test tubes to about 37°C? Give two aims of the experiment. [10 marks]

PART I [40 marks]

Answer all of Question 1

Questions for this section are in the printed paper.

PART II [45 marks]

Answer anythreequestions from this section

Question 1

(a) (i) State two conditions that are required for photosynthesis to take place. (ii) How would you show that starch is formed during photosynthesis? (b) Write a balanced chemical equation to show the reaction between hydrogen and oxygen. (c) (i) What is a satellite? (ii) Give one example of a natural satellite. (iii) List two uses of artificial satellites.

Question 2

(a) Define (i) self-pollination (ii) cross-pollination (b) State two ways in which cross-pollinated plants are better than self-pollinated plants. (c) Sodium chloride is prepared by the reaction between dilute hydrochloric acid and sodium hydroxide. (i) Write a balanced equation for the reaction (ii) What is the name given to this reaction? (d) Describe an experiment to show that pressure acts in all directions in a liquid

Question 3

(a) (i) What is a vector of a disease? (ii) State two methods each by which the vectors of the following diseases can be destroyed: α) river blindness; β) malaria (b) Write down the systematic names of the following compounds: (i) CaCO3 (ii) FeS (iii) NaCl (iv) NaOH (c) (i) Give the two properties that are common to all states of matter. (ii) In an experiment to determine density, a stone of mass 60 g is put into a bowl containing water If the level of the water rises from the 60 cm3 mark to 75 cm3, determine the density of the stone

Question 4

(a) Mention five differences between plants and animals (b) Define each of the following terms, giving one example in each case (i) compound (ii) element (c) (i) Give two differences between an electrical insulator and a conductor. (ii) Draw and label a simple electrical circuit made up of a cell and a switch connected to two electrical bulbs connected in parallel