Format of Experiment Question

      The last question in Paper 2 is usually question number 8, which carries 12 marks. This question will be based on an experiment where you have to write down:

• Readings [Make sure the unit of measurement you use is correct]
•   Variables

         a)  Constant variable [This is the fixed variable]

          b)  Manipulated variable [This is the factor that is changed in the experiment to get the specific result. ie: Length of wire (cm)]

          c) Responding variable  [This comes from the readings or the results of the experiment. ie: Ammeter reading]

• Aim of experiment
• Example: To study/investigate the relationship between the manipulated and the responding variable.
• Hypothesis
• This shows the relationship between the manipulated and the responding variable.
• Writing format: "When the manipulated variable increases/decreases, the responding variable will increase/decrease."
• Observation
• What can be observed or what you can see.
• Plot a line or bar chart
• Prediction
• This will be based on your graph, where you have to predict a reading for the responding variable when given a value for the manipulated variable.
• Example of a question: From the graph, find out the value of T when the mass is 10g.
• Inference

• This is the early conclusion based on your observations.
• Example: The change in the responding variable depends on the manipulated variable.
• Conclusion This is the same as the hypothesis.

Note: It is very important to get your manipulated variable and the responding variable correct!