BECE JHS Integrated Science 2012 Past Questions

The S.I. unit for measuring the work done by a force is

(a) The diagrams below are illustrations of an experiment in the laboratory using a piece of stone, a
cork of mass 4.0 g and other necessary materials.
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The initial volume of water in A was read and noted. A string was attached to a piece of stone
and the stone lowered gently into the water as shown in B. The volume was again read and noted. Finally, the cork of mass 4.0 g was attached to the stone and both materials lowered gently into the water as shown in C. The volume was read and noted.

(i) Why did the level of the water rise when the stone was lowered gently into it as shown in diagram B
(ii) Why was it necessary to attach the stone to the cork before lowering it gently into the water as shown in diagram C?
(iii) What would have happened if the cork alone were lowered gently into the water?
(iv) What is the volume of the
(a) stone?
(ß) cork?
(v) Calculate the density of the cork.

B. A salt solution was prepared in the laboratory using the set of apparatus illustrated below.
Study the illustrations carefully and use them to answer the questions that follow.
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(i) Name each of the apparatus labeled I, II, III IV and V.
(ii) State one function of each of the apparatus labeled I, II, III, IV and V.

1(c) The diagram below is an illustration of the external features of a flowering plant.
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Study it carefully and use it to answer the questions that follow

(i) Name the parts labeled I, II, III, IV, V and VI
(ii) State one function of each of the parts labeled I, II, III, V and VI
(iii) State the two main parts of a flowering plant

D. The diagram below is an illustration of a small farm animal.
Study it carefully and use it to answer the questions that follow
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(i) Identify the animal
(ii) Name each of the parts of the animal labeled I, II, III, IV, V and VI
(iii) Name the structure in which the animal is kept
(iv) Mention three breeds of the animal.
(v) State two management practices to be adopted in order to control diseases and pests in the rearing of the animal.

The chemical formula of a compound describes the

(a) (i) What is technology?
(ii) State one use of technology in communication

(b) Write and balance each of the following chemical equations:
(i) Fe + O2 -> Fe2O3;
(ii) Na + Cl2 -> NaCl;
(iii) H2 + O2 -> H2O

(c) State one function of each of the following components of a typical cell:
(i) nucleus;
(ii) chloroplast;
(iii) mitochondrion

(d) Mention four cultural practices in vegetable crop production

(e) Name two agencies in food safety and quality assurance in Ghana.

Which of the following life processes is represented by the equation
Glucose + oxygen ? carbon dioxide + water + energy

(a) Explain why a tomato plant is likely to wilt if too much fertilizer is applied to it.

(b) (i) Give two differences between electrical insulators and electrical conductors.
(ii) State two effects of illegal electrical connections in the home.

(c) Explain each of the following terms as used to describe change of state of matter:
(i) condensation;
(ii) freezing

(d) (i) State two diseases of the circulatory system in humans
(ii) Mention two ways in which each of the diseases you have stated in (d) (i) can be prevented.

Each layer of soil profile is known as

(a) (i) What is a transistor?
(ii) Give two uses of a transistor

(b) Mention the suitable solvent for each of the following solutes:
(i) grease;
(ii) ink stain
(iii) starch
(iv) cube
(v) sugar
(vi) oil
(vii) paint
(viii) iodine

(c) (i) What is a respiratory organ?
(ii) Name two structures of the respiratory system of humans.

(d) (i) What is agricultural chain?
(ii) Name two types of agricultural chain

When the p-n junction of a transistor is reverse biased

(a) (i) What are stars?
(ii) Arrange in order, starting from the sun, the first four planets in the solar system.

(b) (i) State two differences between plants and animals;
(ii) two similarities between plants and animals

(c) Explain each of the following farming systems:
(i) pastoral farming
(ii) ecological farming

(d) State the properties of water in terms of
(i) odour,
(ii) taste,
(iii) effect on litmus

When a solid-liquid mixture is filtered, the liquid that separates out into the container is called

(a) What are
(i) annual plants?
(ii) perennial plants?

(b) Mention one danger involved in each of the following activities in the laboratory:
(i) eating or drinking water in the laboratory;
(ii) washing hands with unknown liquid in a beaker;
(iii) walking barefooted.

(c) (i) What is a digestive enzyme?
(ii) Give two examples of digestive enzymes in humans.

(d) Give two differences between conduction and radiation

Which of the following processes involves the solid state of matter?

Which of the following farming systems is most effective in maintaining soil fertility?

The disease in humans which is associated with insufficient intake of calcium is

The arrow in the circuit symbol of either n-p-n or p-n-p transistor is always on the

Which of the following insect pests of crops has piercing and sucking mouthparts?

A reflex action involves the

The type of image formed in a plane mirror is always

Which of the following statements about acids are correct?
I. They turn red litmus paper blue
II. They can be classified as either organic or mineral acids
III. They can be neutralized by bases

A transistor is said to operate in an active region whenfard biased

Tuberculosis is spread

One function of engine oil in the engine of a tractor is to

Black pod is a disease of

The efficiency of a machine is always less than 100% because part of the energy input is used to

Which of the following electronic components are used to produce oscillator circuits?
I. Transistor
II. Inductor
III. Capacitor

Which of the following sources of light is natural?

Which of the following substances are carried by the blood?

The practice of starting new organization in response to identified opportunities is termed

The sub-atomic particle with zero charge in the nucleus of an atom is called

Which of the following management practices greatly helps in record keeping?

In the pin-hole camera, when the size of the pin-hole is increased, the image formed is

Non-reactive metals are preferred in making ornaments and jewellery because they

Producers in an ecosystem are plants that

The use of resistant varieties of crop in controlling diseases is described as

The chemical formula for aluminium oxide is represented as AlxOy. The values of x and y are respectively

In electrical circuits, the component that protects appliances against very high currents is the

One benefit of technology to industrialization is

Which of the following factors contribute to early parenthood?
I. Poverty
II. Illiteracy
III. Lack of parental care
IV. Peer pressure

Which of the following examples of fertilizers improves soil texture?

The reaction between hydrochloric acid and sodium hydroxide produces

In modern electrical wirings the colour code for the live wire is

An example of soil minor nutrient is

The complete development of a human foetus in the womb normally takes

A material that allows a small amount of light energy to pass through it but cannot be seen through is referred to as

The leads of the transistor responsible for activation is the