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This lesson covers the AQA required practical on the effect of light intensity on the rate of photosynthesis. This practical uses an aquatic plant (usually pondweed such as Elodea or Cabomba) and measures the volume of oxygen produced at different distances from a light source. You must be able to describe the method, explain the science behind it, analyse results and evaluate the procedure.
To investigate the effect of light intensity on the rate of photosynthesis using an aquatic plant.
As light intensity increases (by moving the lamp closer to the plant), the rate of photosynthesis will increase, producing more oxygen per minute. This is because light provides the energy needed for photosynthesis, so more light means more energy is available for the reaction.
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