Paper 5 - planning an investigation - Mindmap in A Level and IB Biology

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Paper 5 - planning an investigation
- 1- stating a hypothesis
  - - Tested to confirm whether or not a variable has an effect on another variable & what the relationship is between them
- 2- Variables
- 3- Range and intervals
- 4- Apparatus
  - Sometimes apparatus needed to be used will be stated in the question
    - IF NOT= use apparatus best suited for experiment
- 5- Method
  - 1- Changing & Measuring the IV
    - 2- Keeping key variables constant
      - 3- Measuring DV
  - 4- Sequence of steps ( 1-7)
- 6- Risk asessment
  - Identify ways in which experiment may cause injury/ accident & suggest safety precautions related to risk
- 7- Reliability
  - State that the experiment should be repeated 3 times for each value of IV
    - In this way a mean can be calculated
2.2) Independant variable= factor that you change in an investigation
- Dependant variable= factor that changes as the result of changes in the IV
Controlled variables = need to be sure there is no other variables that may affect results
- Continuous variable= can have any value within its range
  - Discontinuous variable= has only a limited number of possible values
- Decide what are the IV and DV & important variables that should be controlled and standardised

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