BI-963
Planning an investigation
Biology · Secondary 3 · Easy · Planning an investigation
A student sets up an experiment to measure oxygen production from an aquatic plant at different light intensities. Which two factors must be kept constant in each repeat to ensure a fair test?
- Size of aquatic plant and time exposed to the light
- Size of beaker and height of measuring cylinder
- Volume of water and colour of the light
- Distance of lamp and volume of oxygen collected
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