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Factors Affecting the Rate of Photosynthesis Tim Hodgson 11M Introduction: All living green plants photosynthesise. In photosynthesis, carbon dioxide, water and light are absorbed and used to form glucose for the plant and oxygen as a by-product. As with all reactions, the rate can be changed by altering a number of factors. In photosynthesis, the most substantial variables which affect the rate are temperature, carbon dioxide concentration and light intensity. This is the premise of this experiment - investigating the limiting factors in photosynthesis. Due to restrictions in the environment, it would not be viable to alter the carbon dioxide concentration in the air in the classroom and it would be near impossible to achieve a suitable degree of accuracy if temperature was the independent variable. Therefore, light intensity had to be chosen as the factor to be investigated. The plant on which the theory and prediction will be tested will...

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