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Photosynthesis and limiting factors.
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GCSE Biology Coursework Photosynthesis and limiting factors Plan for the experiment, which will evaluate how the rate of photosynthesis in a water plant is affected when the intensity of a light source is varied. Aim: To investigate how light intensity affects the rate of photosynthesis. Background Information: Plants need carbon dioxide, water, light and chlorophyll in order to make food; and starch and oxygen are produced, if one of these is missing then starch cannot be produced. Photosynthesis occurs rapidly or slowly, depending on the circumstances and this will determine, how much food is made in a certain period of time. Carbon dioxide and water are the raw materials of photosynthesis and they react to produce starch and oxygen, which are the products. These reactions need energy, which comes from the light and it is the chlorophyll, which enables the plant to use light energy for this process. Glucose is then formed and later turned in...
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