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An Investigation on the effects of Light Intensity on Photosynthesis Plan I plan to investigate how light intensity affects the rate of photosynthesis in pondweed. The rate of photosynthesis will be measured by the number of bubbles given off (considering that oxygen is produced as a waste gas during photosynthesis). The light intensity is measured by the distance between the lamp and pondweed. Fair test: Fix: the amount of pondweed, the amount of water and sodium hydrogen carbonate solution in the test tube, the time allowed for each experiment Change: the distance from the lamp to the pondweed (light intensity) Measure: the number of bubbles given off by the pondweed, the temperature of the water bath Variables: The following are factors that affect the rate of photosynthesis: Light - quality and quantity Carbon dioxide Temperature Water Chlorophyll Light is needed to provide the energy for the reaction to take place because it is an endothermic reaction. This is the variable that I am going...

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