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INVESTIGATION TO FIND OUT HOW AMOUNT OF LIGHT AFFECTS PHOTOSYNTHESIS Introduction: Plants release oxygen as a waste product of photosynthesis. In water plants, this forms bubbles visible in the water, and these bubbles can be encouraged to come out of the cut end of a stem. We are going to find out how rate of bubbling varies with different intensities of light. The test-tube will be subjected to different intensities of light, as the distance that the lamp will be placed form the test-tube will be varied. Hypothesis/Predictions: The higher the concentration of light the greater the rate of photosynthesis. Apparatus List: Test-tube Bench lamp Meter ruler Canadian pondweed 1% Sodium hydrogen carbonate solution Method: 1. Choose a fresh, bright green shoot of Canadian pond weed, and make a sloping cut across its stem to provide a length that would come about 1/2 to 3/4 up a test-tube. Nearly fill the test tube with 1% sodium hydrogen carbonate solution...

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