(a) The diagrams below are illustrations of three different organisms harmful to farm animals
Study the diagrams carefully and answer the questions that follow
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(i) Identify each of the organisms labelled I, II and III

(ii) Which of the organisms is/are:
(α) parasite(s)
(β) pest(s)

(iii) State one effect each of the following organism on farm animals
(α) I;
(β) II;
(γ) III.

(iv) State three methods of controlling the organism labelled III

(b) The diagram below illustrates a burning candle placed in front of a plane mirror MM′ and an image of the candle formed in the mirror.
Study the diagram
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carefully and answer the questions that follow

(i) Name the parts labelled I, II, III and IV
(ii) State the relationship between angles θ1 and θ2
(iii) Give three characteristics of IV in the diagram
(iv) Explain why IV is represented in broken lines

(c) In an experiment to investigate the reactivity of sodium, a piece of sodium metal was dropped in a beaker containing water. The experimental set-up is as illustrated below.
Study the set-up carefully and answer the questions that follow
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(i) State what would happen if a glowing splint was held at the mouth of the beaker
(ii) Name the gas evolved
(iii) Write a balanced chemical equation for the reaction that occurred
(iv) Name two other metals that can react in a similar ways as the sodium

(d) An experiment to investigate the conditions for germination of viable bean seeds was carried out. The diagrams below are illustrations of the different conditions in which the seeds were kept. The beakers labelled A, B and C containing the seeds were kept at room temperature.
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Study the diagrams carefully and answer the questions that follow

(i) State what would happen to the seeds in each of the beakers labelled A, B and C when the experiment was observed after five days. [3 marks]
(ii) Give reasons for each of your answers in (i)
(iii) Why was oil spread on the surface of the water in the beaker labelled C?