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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2005

OBJECTIVE TEST

Objective Test

Question 1

Hydrogen is represented by the chemical symbol H2. This symbol represents

Question 2

A metal expands when there is

Question 3

A safety device which opens an electrical circuit to prevent too much current from passing through the circuit is the

Question 4

An object is placed 20cm in front of a plane mirror. The distance between the object and the image is

Question 5

In which of the following circuit diagrams below will the bulb light?

Question 6

The source of all forms of energy can be traced to

Question 7

When a mango is falling from a tree, its potential energy is changed to

Question 8

Electricity is used by appliances to do work. This means that electricity is a form of

Question 9

Question 9 diagram
A force of 2 N moves a body through a distance of 10 m. Calculate the work done. The diagram below shows a lever system used to move a stone. Use it to answer Questions 10 and 11

Question 10

The distance X is the

Question 11

Less effort is required to move the stone when the

Question 12

An omnivore is an animal that feeds on

Question 13

A meal containing all the essential nutrients in the right amounts is said to be

Question 14

The disease associated with insufficient intake of proteins in children is

Question 15

When testing for proteins in a food substance using Fehling’s solution, the expected colour change is

Question 16

The substance that enables green plants to trap sunlight for the manufacture of food is

Question 17

In man, the conversion of poisonous substances into harmless forms takes place in the

Question 18

Which of the following life processes is represented by the equation below? Glucose + Oxygen → Water + Carbon dioxide + Energy

Question 19

Chlorine gas is passed through water during purification to

Question 20

Arrange the following sources of water in the order of increasing contamination: I. Rain II. Stream III. Well IV. Borehole

Question 21

A solution in which no more solute will dissolve at a given temperature is said to be

Question 22

A clear solution of sugar was cooled from 100°C to 25°C. Some solid sugar was seen to have formed out of the solution after cooling. This shows that sugar

Question 23

Water is sometimes referred to as a universal solvent because it

Question 24

The charge of sulphur in the compound SO2 is

Question 25

The part of the soil that supports plant growth is that part which

Question 26

Plants do not grow well in gravel because the

Question 27

Which of the following parasites lives in the blood of humans?

Question 28

The carrier of the malaria parasite is the

Question 29

Which of the following practices is a method of controlling guinea worm disease?

Question 30

The humidity of the atmosphere is measured with

Question 31

How long does it take the moon to move completely around the earth?

Question 32

Steel is an example of a

Question 33

Which of the following elements is a metal?

Question 34

Metals that are usually used to make ornaments have low

Question 35

The food processing method in which germs are prevented from multiplying by applying a low temperature is

Question 36

The function of blood platelets is to

Question 37

A fish is able to swim with little resistance in water because it has

Question 38

When a person jumps up, he/she is able to come down because of the

Question 39

A metal displaces 5.0 cm³ of water when completely immersed in water. If the mass of the metal is 35.0 g, calculate its density.

Question 40

Oxygen from the air is able to get into the blood by

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, a pupil took two empty Milo tins and made holes in their sides as shown in the diagram above.The pupil then filled the Milo tins with water. Draw and label the diagrams to show what the pupil will observe in set-up A and set-up B Explain the observations in set-up A and set-up B What is the aim of set-up A? What is the aim of set-up B?
  2. In an experiment, equal volumes of dilute hydrochloric acid (solution A) and dilute sodium hydroxide (solution B) are mixed together to form solution C. What is the volume of solution C? Red litmus paper and blue litmus paper are dipped in turns into solutions A, B, and C. State the observations you will make in all six cases. Give the name of the reaction that took place between solution A and solution B. Identify solution C. State what will happen when solution C is heated.
  3. The table below gives the steps that were followed in an experiment to test for starch in a green leaf freshly taken from a tree. Stages in the Test for Starch I. Leaf is put into boiling water for 1 minute II. Leaf is dipped in alcohol warmed in a hot water bath III. Leaf is washed in cold water IV. Leaf is dipped into iodine solution State the reason for carrying out each of the activities in stages I, II, and III. What happens when the leaf is dipped in iodine solution? Give the colour changes of the leaf from the beginning of the experiment to the end of the experiment. Why is the alcohol warmed indirectly in a water bath? Explain what will be observed if the test is carried out on a leaf taken from a plant kept in a dark room for 1 day.

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) Define respiration. (ii) Give two differences between photosynthesis and respiration. (b) (i) List the chemicals used in the preparation of carbon dioxide in the laboratory (ii) How would you test for carbon dioxide in the laboratory? (c) (i) State four effects of a force on a body. (ii) A horizontal force of 250 N is applied to pull a piece of wood lying on a smooth surface through a distance of 20 m. Calculate the work done.

Question 2

(a) (i) Give two differences between a vein and an artery. (ii) State two functions of red blood cells. (iii) Mention two diseases associated with the circulatory system. (b) (i) Classify the following processes into a physical change and a chemical change: Cooking of food; Melting of candle; Melting of ice; Rusting of iron; Dissolution of sugar in water; Burning of wood into ash. (ii) Explain the basis of the classification in (b)(i). (c) (i) State the laws of reflection. (ii) Draw a ray diagram of light incident at an angle of 40o on the surface of a plane mirror.

Question 3

Theory question 3 diagram

(a) (i) Explain vegetative reproduction (ii) State two differences between sexual reproduction and vegetative reproduction. (iii) Give one advantage of vegetative reproduction. (b) (i) Name suitable solvents for the following substances: oil paint, fat, common salt, plant pigments. (ii) What is the name given to a substance dissolved by a solvent? (c) The diagram below represent a simple machine. (i) What class of simple machine does it represent? (ii) Name the parts labelled I, II and III (iii) Give two examples of machines used in everyday life which work on the same principle as the system illustrate above.

Question 4

(a) (i) Give two differences between a parasite and a vector. (ii) Write down the names of three endo-parasites and their hosts. (b) An atom has eight protons and nine neutrons. (i) Draw the atomic structure of the atom. (ii) If the atom gains two extra electrons what will be the charge of the ion formed? (Show working) (c) (i) Three insoluble liquids X, Y and Z are shaken together in a bottle and allowed to settle. The densities of the liquids are as follows: X = 1.5 g/cm3 Y = 3.0 g/cm3 Z = 1.0 g/cm3 Draw a sketch to show the various layers into which the liquids settle. (ii) The density of petrol is 0.9 g/cm3. Calculate the volume of 300 g of petrol.