Biology Module 1 | OCR A Level

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6 Terms

1
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What is the independent variable?

The factor being changed (x axis)

2
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What is the dependent variable?

The factor being measured to see its effect on the independent variable (y axis)

3
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What is the control variable?

The other factors that could affect the dependent, which must be kept constant.

4
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What is accuracy?

How close a measured value is to the true value

5
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What is accuracy affected by?

Systematic errors (eg. balance that is not zeroed)

6
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How can accuracy be improved?

By calibrating equipment, using a colorimeter instead of judging colour change by eye, or better control variables.