BECE JHS Integrated Science 2017 Past Questions

The instrument used to measure relative humidity is the

(a) The diagram below is an illustration of a longitudinal section of a canine tooth in humans.
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Study the diagram carefully and answer the questions that follow.

(i) Name each of the parts labelled I, II, III, IV and V.
(ii) What is the function of each of the parts labelled I and III?
(iii) Which of the labelled parts could be affected by tooth decay?
(iv) State three ways by which tooth decay may be prevented.

(b) The diagram below is an illustration of a scientific phenomenon which occurs in nature.
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Study the diagram carefully and answer the questions that follow.

(i) What phenomenon does the diagram illustrate?
(ii) Identify each of the parts labelled I, II, III, IV and V.
(iii) Explain why an object at the bottom of a pond appears closer to the surface than it actually is.

(c) The diagram below is an illustration of an experiment performed to separate the components of muddy water.
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Study the diagram carefully and answer the questions that follow.

(i) Name each of the parts labelled I, II and III.
(ii) State the function of the part labelled II.
(iii) Name the substance obtained as the filtrate.
(iv) State three physical properties of the filtrate.
(v) Name two other materials that could be used in place
of the part labelled II.

(d) The diagram below illustrates a farmland on a sloppy area.
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Study the diagram carefully and answer the questions that follow.

(i) What process is likely to occur on the farmland when it rains heavily?
(ii) State two farming practices that can also lead to the process mentioned in (i).
(iii) List four farming practices that could be used to control the process mentioned in (i).
(iv) Mention three soil resources that would be depleted from the farmland when it rains heavily.

The S.I. unit for density is

(a) An atom Y has atomic number 12. It loses two electrons in order to be stable.
(i) State the proton number of the atom before it loses electrons.
(ii) State the electron number of the atom:
(α) before it loses electrons.
(β) after losing electrons.

(iii) Name the type of ion formed by the atom when it loses two electrons.

(b) Name four farming systems used in crop production.

(c) (i) What is dispersal of seeds?
(ii) State two characteristics of seeds dispersed by wind.

(d) Explain the term forward bias of a p-n junction diode.

When light travels from glass to air, its speed is

(a) (i) What is an acid?
(ii) Give two differences between an acid and a base, in terms
of taste and feel.

(b) (i) Define pressure.
(ii) A force of 200 N is exerted on an area of 50 m2.
Calculate the pressure exerted by the force.

(c) Explain the following terms as associated with living organisms:
(i) unicellular;
(ii) multicellular.

(d) Give two reasons why soil air is important.

When a piece of iron rod is brought near a permanent magnet for a while it becomes magnetised by

(a) (i) Explain the following terms as applied to machines:
(α) work input;
(β) work output.

(ii) State one factor that limits work output for a given work input in a simple machine.

(b) (i) What is chloroplast?
(ii) Differentiate between aerobic respiration and anaerobic respiration.

(c) (i) State the colour change that would occur when blue litmus paper is dipped into a solution of:
(α) vinegar;
(β) wood ash.

(ii) Name the products formed when hydrochloric acid reacts with sodium hydroxide.

(d) List two benefits of vegetables to humans.

A rheostat is used in an electric circuit in order to

(a) (i) Differentiate between egestion and digestion in nutrition.
(ii) What is the end-product of digestion?

(b) Give one example of a chemical compound used in:
(i) medicine;
(ii) agriculture
(iii) industry

(c) (i) Define the term soil profile.
(ii) State two ways in which soil profile is important in crop production.

(d) (i) State two steps used by scientists in doing their work.
(ii) Give two subjects that may be considered as applied sciences.

Which of the following statements about an opaque object is correct? An opaque object

(a) (i) What is an alloy?
(ii) State two causes of corrosion of metals.

(b) (i) What is a planet?
(ii) Name two planets between the Sun and the Earth.

(c) State four functions of the circulatory system in humans.

(d) (i) Define the term crop rotation.
(ii) Give one example of a chemical method of controlling pests on crop farms.

One of the characteristics of a solid is that

The instrument used to measure current in an electrical circuit is the

The bottom of a pool of water appears closer to the surface than it is. Which of the following properties accounts for this observation?

An example of a source of energy which is non-renewable is

Which of the following apparatus is not required in the process of distillation in the laboratory?

The number of oxygen atoms present in three molecules of carbon dioxide is

The chemical formula Cl₂ represents two

Which of the following substances can rust?

Energy stored in food is referred to as

Which of the following substances is a mixture?

The mole is the S.I. unit of

An atom has a proton number of 17 and neutron number 18. Determine the number of electrons in the third shell of the atom.

An example of mixtures that can be separated by the method of filtration is

Which of the following liquids would turn blue litmus paper red?

Which of the following particles constitute matter?
I. Atoms
II. Molecules
III. Ions

An example of inheritable characteristics in humans is

Which of the following statements about aerobic respiration is correct?

Sperms produced by the testes in humans are temporarily stored in the

Which of the following changes normally occur during old age in humans?

One of the characteristics of wind pollinated flowers is that they

The testes is normally located outside the body of the male becausetuch space.

The organelle which occupies the largest portion of a plant cell is the

Movement of the ribs is brought about by the

Fertilisation in humans usually occurs in the

Which of the following processes is an example of osmosis?

The part of a living cell which is semi-permeable is

Which of the following statements about soil profile is/are correct? It helps the farmer to determine
I. soil fertility.
II. water-holding capacity of the soil.
III. depth of the soil.

Which of the following practices is not a principle of crop rotation?pds should be allowed during the time of rotation.

The relative proportion of sand, silt and clay in a given sample of soil is soil

The first factor to be considered when deciding to cultivate a particular vegetable is

Which of the following factors should be considered when selecting a site for vegetable crop production?
I. Nearness to the market.
II. Topography of the land.
III. Nearness to the sea

Which of the following activities are cultural practices in the cultivation of cabbage?
I. Pruning
II. Weeding
III. Watering

An example of a vegetable crop is

The majority charge carriers in a p-type semi-conductor are