The diagrams below are illustrations of an experimental set-up.

Study the diagram carefully and answer the questions that follow.

1. Identify each of the parts labelled I, II and III.

2. Name the method of separation in each of the set-up:

   Α: A;

   Β: B.

3. State the class of mixtures that the experimental set-up A could be used for.

4. Give a reason for the answer stated in (iii).

5. Name one possible component of the mixture in set-up B.

6. State the function of the part labelled IV.

The diagram below is an illustration of a part of a system in human

Study the diagram carefully and answer the questions that follow.

1. Name the system illustrated.

2. Name each of the parts labelled I, II, III, and IV.

3. What is the role of the part labelled I?

4. Name three diseases that affect the system illustrated.

The diagram below illustrations of devices used to do work easily.

Study the diagram carefully and answer the questions that follow.

1. Identify the apparatus illustrated.

2. Name each of the parts labelled I, II, and III.

3. Give one use each of the parts labelled I and II.

4. What ecological factor was measured?

5. State three ways in which the ecological factor measured in (iv) is important in agricultural soils.

6. Name one farm tool that aids the ecological factor measured in (iv) to perform its function in agricultural soils.

7. Describe how the farm soil tool named in (vi) is used to aid the factor measured in the experiment.

The diagrams below are illustrations of electrical circuits.

Study the diagram carefully and answer the questions that follow.

1. Identify each of the components labelled I, II, and III.

2. State the type of arrangement of resistors (R) in B.

3. State the effect of the arrangement of resistors in each of the diagrams A and B on III.

4. Give a reason for each of the answers stated in (iii).