1. A fundamental concept or theory
2. A possible explanation to the problem.
3. An important statement of a research conclusion 
4. A stage in data interpretation.

The factors that affect the problem being investigated are referred to as:

1. Dependent factors
2. Variables
3. Independent factors
4. Conditions

 In scientific study, the tentative explanation for the observed chemical phenomenon can be proved by:

1. Data analysis
2. Experimentation
3. Hypothesis
4. Observation

(a)    Explain three factors which affect the problem being investigated (b) Explain two areas where scientific procedure is applied.

(b)     What are the six procedures which can be used to help a person with severe bleeding on the wound?

 (a)Briefly explain the concept of scientific procedure.

(b) What is the importance of the scientific procedure in daily life? Give two points.

6. (a) Differentiate hypothesis from analysis.

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 (b) Effective use of the four senses of observation is important before a chemist can make conclusion. With four points, show how the senses are used as tools of observation during experimentation by giving one example for each.

(i)     ………… ………… ……………

(ii)  ………… …………… ………….

(iii) ………… ……………… …… ….

(iv) ………… …………… ……………