Practical skills

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Question 12
Medium

A student plans to investigate the effect of temperature on the rate of photosynthesis in pondweed.

An experimental setup showing a beaker containing pondweed immersed in a sodium hydrogen carbonate solution. This beaker is placed inside a larger water bath container. A thermometer is placed inside the inner beaker to measure temperature. A lamp is set up at a fixed distance from the beaker, with a ruler placed between them to ensure the distance remains constant. A stopwatch is shown alongside the apparatus.

Describe how the student could use this apparatus to investigate the effect of temperature on the rate of photosynthesis.

In your answer you should include:

  • how to change the temperature (the independent variable)
  • the variables that need to be kept constant (controlled variables)
  • the measurements that should be taken.
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Practical skills Questions

  1. GCSE
  2. /Biology
  3. /Practical skills