[Science PMR] The 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
  
  • Constant variable [This is the fixed variable]
    
    
  • Manipulated variable [This is the factor that is changed in the experiment to get the specific result. ie: Length of wire (cm)]
    
    
  • 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!