[WASSCE-BECE-NOVDEC-NABPTEX 0547316472]

1. (a) (i) List two raw materials used in the manufacture of indigenous soap.

(ii) State three ways of improving upon the quality of indigenous soap. *[5 marks* ]

(b) Explain three ways in which the human sperm cell is adapted to its function. *[6* *marks]*

(c) State four human activities that result in the depletion of soil resources. *[4 marks]*

(d) Describe how the relative density of a salt solution can be determined using the hydrometer.

*[5 marks]*

2. (a) (i) Explain the term tissue as applied to living organisms.

(ii) List two types of tissues found in a green plant.

(iii) State one function each of the tissues listed in (ii) above.

*[6 marks]*

(h) (i) State the law of conservation of energy.

(ii) In a simple machine, the energy input is 120 J. If the efficiency of the machine is 80%,

calculate the energy output.

*[5 marks]*

(c) (i) What is a chemical compound?

(ii) State four differences between a covalent and an ionic compound.

*[6 marks]*

(d) Stale three features of the intensive system of keeping animals. *[3 marks]*

3. (a) (i) Describe briefly the production of sound in each of the following instruments:

(α) trumpet;

(β) drum.

(ii) State one difference between a musical note and noise.

*[5 marks]*

(b) (i) Give the reason for the treatment of water for domestic use.

(ii) State three methods of improving upon the quality of water for domestic use.

*[4 marks]*

(c) (i) Explain the term artificial insemination as used in animal production?

(ii) State three benefits of artificial insemination.

*[5 marks]*

(d) Describe the processes involved when the human eye views an object. [6 marks]

4. (a) (i) List three methods of fertilizer application.

(ii) State three factors to be considered before the application of fertilizer to crops.

*[6 marks]*

(b) Explain the following ecological terms:

(i) community;

(ii) population;

(iii) habitat.

*[6 marks]*

(c) (i) What is dispersion of light?

(ii) Name the

(α) natural phenomenon that involves dispersion of light, ((3) dispersing

(β) medium for the phenomenon named in (α) above.

*[4 marks]*

id) Describe how a pure sample of sodium chloride could be obtained from a mixture

of sodium chloride and sand.

*[4 marks]*

5(a) (i) State two characteristics of a concentrated acid.

(ii) State three precautions to be taken when diluting concentrated sulphuric acid in the

laboratory.

*[5 marks]*

(b) A man heterozygous for the rhesus factor marries a woman of the same genotype.

Determine the proportion of the children who would carry the rhesus factor. Illustrate your

answer with a genetic diagram.