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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2007

OBJECTIVE TEST

Objective Test

Question 1

Which of the following properties is true about all matter? Matter has

Question 2

The type of energy obtained when an electric bulb is connected to a battery is

Question 3

A magnet can attract all these substances except

Question 4

The process by which heat travels along a metal is called

Question 5

The instrument used to measure temperature is the

Question 6

A stick placed in water appears to be bent because light travelling from the water to the air is

Question 7

A plane mirror could be described as opaque because it

Question 8

A suitable machine for loading drums of palm oil onto a truck is

Question 9

The human forearm is an example of

Question 10

The chemical substances which help in the digestion of food are known as

Question 11

Digestion of proteins starts from the

Question 12

A reflex action involves the

Question 13

Which of the following structures is not part of the central nervous system?

Question 14

When the testa of a soaked bean is removed, the seed is seen to be made up of

Question 15

One function of the root system of plants is to

Question 16

Which of the following diseases is caused by a virus?

Question 17

The different types of teeth that an animal has gives an indication of the nature of its

Question 18

Exchange of gases takes place in the respiratory system through the

Question 19

Water that requires more soap in order to form lather is described as

Question 20

One best way of making water safe for drinking is by

Question 21

The process whereby a hot saturated solution is cooled to obtain the solute is called

Question 22

If a mixture of water and powdered charcoal is allowed to stand for a long time, the charcoal

Question 23

The chemical symbol of potassium is

Question 24

The atom of an element is represented as . How many electrons are in the atom?

Question 25

Which of the following agricultural practices prevents loss of water from the soil?

Question 26

Soil conservation is important because it prevents loss of

Question 27

Foot rot disease in animals is caused by

Question 28

A patient with symptoms of diarrhoea and vomiting may be suffering from

Question 29

Which of the following human activities pollutes the environment?

Question 30

Which of the following features of a parent would not be inherited by the children?

Question 31

Which of the following bodies is at the centre of the solar system?

Question 32

The chemicals used in the preparation of ammonia in the laboratory are

Question 33

Steel is an alloy of

Question 34

The property of a metal that makes it possible for it to be beaten into different shapes is called

Question 35

Movement of the particles of a gas from a region of higher concentration to a region of lower concentration is known as

Question 36

Oxygen in the blood finally reaches the parts of the body through the

Question 37

An aluminium cube with side measuring 2 m has a mass of 24 kg. Calculate the density of the aluminium.

Question 38

The force that opposes the motion of an object on another object is called

Question 39

Water is prevented from passing through the tiny holes in an umbrella by

Question 40

Which of the following methods of preserving food makes use of heat energy from the sun?

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, an iron bar is magnetized by dragging a magnet over the surface of the bar from end A to end B several times as shown in the diagram below. Mention the method of magnetization Give the polarity of the ends A and B of the bar after the magnetization. How will you test that the bar AB is a magnet? Indicate how you will test for the poles of A and B of the bar. Give one precaution that should be taken during the magnetization process. Name one other method of magnetization
  2. The set-up below is used to prepare gases in the laboratory Give the names of the parts labelled I, II, III and IV. Write down the two names of the method of gas collection. Explain how the gas collects over the water. Name two gases that can be prepared using the set-up.
  3. The set-up below shows air being breathed out through the mouth into test-tube containing lime water. Why does the lime water turn milky? Identify the milky substance produced. Write a balanced chemical equation for the reaction. Name two other substances present in breathed-out air. What is the aim of 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) What is a living cell? b) Give one function of each of the following components of a living cell: (i) cell membrane (ii) chloroplast (iii) nucleus c) Make sketches to show the arrangement of the particles in each of the three states of matter. d) What instrument would you use to measure each of the following quantities: (i) volume of a liquid (ii) mass of a stone (iii) time (iv) speed of the wind?

Question 2

a) Name three deficiency diseases associated with diet and state their causes. b) (i) What is hard water? (ii) Mention three ways by which hard water can be made soft. c) (i) Explain how sound is produced. (ii) State one example each, of the following instruments α) wind instrument β) string instrument

Question 3

a) State two examples of a (i) carnivore (ii) herbivore b) What is the difference between egestion and excretion? c) Explain briefly why (i) gold is used to make necklaces and earrings. (ii) steel is used instead of iron to make car bodies d) (i) What is surface tension? (ii) Explain why the surface of water in a container is not flat but curved.

Question 4

Copy and complete the table below: b) Name two different particles of matter which carry (i) a negative charge (ii) a positive charge (iii) no charge c) A simple machine moves a load of 20N through a distance of 2m. If it uses an effort of 25N which moves through a distance of 4 m, calculate the (i) work input (ii) work output (iii) efficiency of the machine