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THE WEST AFRICAN EXAMINATIONS COUNCIL GHANA

Basic Education Certificate Examination

Integrated Science 2020

OBJECTIVE TEST

Objective Test

Question 1

Which of the following parts of the tooth is embedded in the jaw bone?

Question 2

Which part of the human body stores sperms temporarily?

Question 3

An advantage of soft water over hard water is that soft water

Question 4

The work done by force of 20 N on a body is 60 J. Calculate the distance through which the force moved

Question 5

Which of the following processes removes carbon from the atmosphere?

Question 6

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

Question 7

Which of the following statement(s) is/are true of a shadow? A shadow is formed I. by a transparent object, II. by an opaque object, III. on a screen.

Question 8

Which of the following diseases results from malnutrition?

Question 9

The chemical formula of an aluminium sulphide is AlyS3.Determine the value of y

Question 10

Which of the following sources of energy is/are renewable? I. Wind II. Coal III. Crude oil

Question 11

Soils are describe as heavy because they

Question 12

An example of a legume is

Question 13

The process used to separate a mixture of iron filings and sulphur is

Question 14

The colour of a soil profile determines the

Question 15

The end-product of digestion of fats and oils is

Question 16

The unit of potential difference

Question 17

A stone displaced 20cm3 of water when immersed in the water. If the mass of the stone is 40g. find the density of the stone

Question 18

One similarity of physical and chemical changes is that both

Question 19

Which of the following elements is a macro-nutrient?

Question 20

The process by which metabolic wastes are removed from the body is called

Question 21

The part of the flower that produces pollen grains is the

Question 22

Which of the following statement(s) about pressure in fluids is/are correct? Pressure I. decreases with depth II. increases with depth III. does not depend on the area

Question 23

A boy who is seventeen years old is an

Question 24

The mode of heat transfer in which no material is involved is known as

Question 25

Which of the following factors are used to describe a fertile soil? I. Amount of organic matter II. Color III. Texture

Question 26

The major charge carriers in p-type semiconductors are

Question 27

The dry season in Ghana is mainly from

Question 28

The practice that excess branches of growing plants are removed is termed

Question 29

Which of the following soil type has the highest capillarity?

Question 30

Which of the following farming practices promote soil erosion I. Alley cropping II. Bush burning III. Over grazing

Question 31

The nearest planet to the sun in the solar system is

Question 32

In which of the following devices is electrical energy transformed into light energy

Question 33

An example of a semi-metal is

Question 34

The elements in the periodic table are arranged according to their

Question 35

Which of the following states of matter are fluids I. Solid II. Liquid III. Gas

Question 36

A liquid-liquid mixture can be separated by

Question 37

When an unknown solution reacted with magnesium, a gas was produced. Which of the following solutions could be the unknown solution

Question 38

Which of the following statements about acids correct I. They react with the calcium carbonate to give a gas II. They turn red litmus paper blue III. They react with reactive metals to give a gas IV. They turn blue litmus paper red

Question 39

The structure which enables a fish to breathe in water is

Question 40

A fruit in which the pappus has been modified into a parachute structure is dispersed by

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 diagram below are illustrations of two cells labelled A and B Study the diagram carefully and answer the questions that follow. Name each of the parts labelled I, II, III and IV. Which of the parts named in (a)(i) is the same as the parts labelled VI and IX in cell B? Which of the cells is a plant cell? Give two reasons for the answer given in (a)(iii). Tabulate two differences between the parts labelled I and V.
  2. The diagram below is an illustration of an experiment carried out in the laboratory. Study the diagram carefully and answer the questions that follow. Read and record the: α) mass of irregular object (M) in I β) Volume of water (V1) in II γ) Volume of water (V2) in III Determine the volume of the irregular object. Calculate the density of the irregular object. Name the instrument that could be used to measure the mass of an irregular object. State one precaution to be taken in performing the experiment.
  3. The following activities were performed in the laboratory by groups of pupils. Study the activities and answer the questions that follow. Camphor was heated. Wood was burnt. Iron nails were heated strongly. Sodium chloride was dissolved in water. Which of the following activities are: (α) chemical processes; (β) physical processes. Give two reasons why the activities listed in: (α) are chemical processes; (β) are physical processes. Give two examples of physical change that take place in your environment.
  4. A farmer cultivated soya bean, yam and maize on a farm in a rotational programme as illustrated below. Study the diagram carefully and answer the questions that follow. Copy and complete the table. List three principles to consider when planning this rotational programme. Give two reasons for selecting the crop named for V in plot 1 year 3. State one advantage of practising this farming system.

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. State three external features of the weaver birds that adapt to live successfully in its environment.
  2. List four harmful effects of air pollution.
  3. Draw the magnetic lines of force around a bar magnet. If the work input of a machine is 30 joules, what would be its efficiency when the work output is 25 joules?
  4. Outline three principles involved in vegetable crop production.

Question 2

  1. State two differences between an ecosystem and a habitat. What is meant by the term blood?
  2. Explain why it is difficult to separate iron and sulphur mixture after strong heating.
  3. Draw and label a diagram of a ray of light which makes an angle of 35° with the surface of a plane mirror.
  4. State two advantages of land rotation. State two disadvantages of land rotation.

Question 3

  1. State one symptom of cerebrospinal meningitis. State one symptom of chicken pox. State one symptom of typhoid.
  2. What is energy? Give two reasons why it is necessary to conserve energy.
  3. State two methods of restoring soil resources. Explain briefly one of the methods stated in (c)(i).
  4. What is a binary compound? Write the chemical formula of the compound formed between: (α) Oxygen and lithium (β) Magnesium and Chlorine Name the compound formed in (ii)(α).

Question 4

  1. State two uses of water in agriculture. Name two crops that are deep rooted.
  2. Explain the term circulatory system in humans. Classify each of the following processes as diffusion or osmosis: (α) absorption of water by the roots of a plant (β) movement of digested food from the small intestine into the blood stream
  3. What is mass? A box of equal size 3 cm has a density of 2.0 g/cm³. What is its mass?
  4. Give the state of each of the following substances: (α) ash; (β) carbon dioxide.

Question 5

  1. State three functions of the female reproductive system in humans.
  2. What is the role of a capacitor in a circuit? Give two examples of a compound machine.
  3. What is Integrated Pest Management? State two advantages of practicing integrated pest management.
  4. State two classes of mixtures. Classify each of the following substances under the classes stated in (i): (α) bronze; (β) when perfume is sprayed into the air.