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A scientific study on a factor affecting the rate of photosynthesis • Light Intensity • Concentration of CO2 • Amount of water • Temperature • Surface area • Pigment of leaf All of these factors change the rate of photosynthesis and to be efficient in analysing how these limiting factors change the rate we will study one, leaving all other variables the same to make it a fair test. Pigment How does the pigment of a leaf affect the rate of photosynthesis? Pigments vary in leaves the investigation comprises of testing if a certain pigment affects the rate of photosynth