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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2009

OBJECTIVE TEST

Objective Test

Question 1

Plants are different from animals because they

Question 2

Which of the following conditions is not required for a current to flow through an electric circuit?

Question 3

Which of the following examples is a source of energy?

Question 4

Heat is transferred from the bottom of water in a container to the top by

Question 5

A mercury thermometer works on the principle that

Question 6

Question 6 diagram
In which of the positions Q,R,S,T in the diagram below will a body have the greatest potential energy?

Question 7

A solar cell produces electrical energy from

Question 8

In a third-class lever the

Question 9

Question 9 diagram
At which positions S,R,Q and P on the lever in the diagram below must a force be applied to lift the load most easily?

Question 10

Which of the following machines works on the same principle as an inclined plane?

Question 11

Power is defined as the

Question 12

Which of the following food substances is not involved in respiration?

Question 13

Which of the following organisms is at the beginning of a food chain?

Question 14

The human male sex cell that takes part in reproduction is the

Question 15

The removal of waste products from the cells of organisms is called

Question 16

The central nervous system consists of the

Question 17

Which of the following life processes is not performed by all living things?

Question 18

All veins in the body carry blood that does not contain oxygen with the exception of the veins from the

Question 19

The method of purification of water containing very little impurities is

Question 20

Boiling and chlorination are used in water purification to

Question 21

The chemical symbol C is the symbol for

Question 22

A substance which is made up of the same kind of atoms is called

Question 23

Which of the following processes results in the formation of new substances?

Question 24

When elements combine to form a compound the

Question 25

Which of the following organisms is likely to increase the oxygen content of the water in a pond?

Question 26

Which of the following parasites is a plant?

Question 27

The part of the soil that is most important for the growth of plants is

Question 28

Which of the following diseases may be associated with water?

Question 29

The mosquito and housefly are harmful in that they

Question 30

Which of the following diseases affects the central nervous system?

Question 31

Day and night occur because the earth

Question 32

Bronze is an alloy of

Question 33

Which of the following substances causes acid rain when released into the atmosphere?

Question 34

Which of the following gases helps in rusting?

Question 35

The force of attraction between molecules of different substances is called

Question 36

A metal block has a mass of 0.1kg. Calculate its volume if the density is 1.0 kgm-3.

Question 37

The food manufactured by a plant is distributed to all parts of the plant through the

Question 38

Some insects are able to walk on water because

Question 39

Oxygen is made available to all cells of the human body by the

Question 40

The force which pulls all objects towards the centre of the earth is the

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. In an experiment, four nails 1, 2, 3 and 4 are fixed with candle wax onto a metal bar and one end of bar is heated by means of boiling water as shown in the diagram below A, B, C and D are thermometers inserted in holes along the bar to measure the temperatures at the various points What is the temperature of the boiling water? State the observations that will be made about nails 1, 2, 3, and 4. State the observations that will be made about the temperatures recorded by thermometers A, B, C, and D. What mode of heat transfer is demonstrated in the experiment? State one effect of heat that is associated with the experiment. State the aim of the experiment.
  2. In an experiment, a student took three iron nails and cleaned their surfaces dry and placed them in three separate test tubes in set-ups A, B and C as shown in the diagram. After three days the nail in set-up A was found to have rusted while the nails in set-ups B and C did not. Answer the following questions Why was the water in set-up B boiled? Explain the function of the oil on top of the water in set-up B. State the purpose of the rubber stopper in set-up C. Why did the nail in set-up A rust? Suggest an aim for the experiment. From the experiment, explain why oil or grease is applied on the surface of a metal to prevent rusting.
  3. In an experiment, the following activities were carried out on two green leaves A and B. Leaf A was from a plant placed in the sunlight for sometime while leaf B was from a plant placed in a dark cupboard for 24 hours. Activity I. Leaves dipped in boiling water for 1 minute II. Leaves dipped in warm alcohol III. Leaves washed in cold water IV. Leaves dipped into iodine solution Explain why each of the activities I, II, III, and IV was carried out. State the colour change of leaf A. Explain why leaf A changed colour but leaf B did not. Suggest an aim for the experiment.

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) Explain each of the following observations in nature: (i) In the depths of the ocean where it is always dark,there are no green plants. (ii) On an island where there areno insects and birds,the pawpaw plant produces onlyflowers but no fruits [6 marks] (b) Describe how soil is formed. [4 marks] (c) (i) State the laws of reflection (ii) Draw a labelled diagram to show the reflection of light on a plane mirror [5 marks]

Question 2

(a) A child is found not to be able to see at night (i) What deficiency disease may the child be suffering from? (ii) What food nutrient is the child lacking? (iii) List two sources of food substances that can provide the nutrient the child lacks. [4 marks] (b) (i) What is an atom? (ii) Name the components of an atom which determines each of the following quantities. (α) mass of an atom (β) charge of an atom (iii) Why is an atom electrically neutral? [5 marks] (c) (i) What is friction? (ii) Give two bad effects of friction. (iii) Give two situations where friction is an advantage [6 marks]

Question 3

(a) (i) Explain heredity (ii) Give two examples of heredity characters [5 marks] (b) Explain whether each of the following processes is a chemical change or a physical change: (i) Rusting; (ii) Burning; (iii) Filtration; (iv) Expansion of copper [4 marks] (c) (i) What is a simple machine? (ii)Name two types of simple machines (iii) Explain why the efficiency of a machine cannot be equal to 100% [6 marks]

Question 4

(a) Study the organisms listed below: Earthworm; Sheep; Cassava plant; Grasshopper; Man; Hen. Draw a food chain using four of the organisms [4 marks] (b) (i) Name four types of forces apart from friction. (ii) Give three effects of a force [7 marks] (c) A certain pupil in a classroom can see clearly on the blackboard only when he sits at the front. (i) State the eye defect the child is suffering from. (ii) Explain why the child is unable to see when he is far from the blackboard. (iii) How can the defect be corrected?