The rate of photosynthesis can be affected by sunlight, temperature, CO2 and O2, and any factor that influences the production of chlorophyll, enzymes, or energy carriers. The rate of photosynthesis will always correspond to that factor which is in least supply. Its rate will only increase when its supply is increased.
An experiment on the effect of light intensity can be done to measure the rate of photosynthesis. You can expose samples of a plant to various light intensities, and determine the relative rates of photosynthesis by observing changes in pH. You would need: pH paper, 5 beakers, 5 samples of the same plant, graduated cylinder, baking soda, 200-watt light source, distilled water, stirring rod. Each beaker would be labeled. Using the graduated cylinder, you would pour 200 mL of distilled water into each beaker. Stir in the same amount of baking soda to each of the beakers until the chemical is dissolved. Next, you would test the pH of the five solutions.......
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