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    Biology GCSE

    Experimental design and control variables

    What Experimental design and control variables means in Biology GCSE, as defined for AQA.

    Definitions of Experimental design and control variables

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    Reference: AQA

    Planning a hypothesis, identifying the independent variable and controlling relevant variables such as the same hand, same partner and same starting position.
    AQA · Structure and function (study guide)
    Key variables such as temperature, immersion time and blotting method are identified and controlled to make the investigation valid.
    AQA · Osmosis (study guide)

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