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Rate of photosynthesis Results Distance (cm) Bubbles per minute Average Light intensity 1 2 3 0 240 249 251 246.7 5 201 222 214 212.3 11000 10 183 185 188 185.3 5800 15 154 152 158 154.7 3570 20 128 118 124 123.3 2320 25 93 88 90 90.3 1780 30 67 65 70 67.3 1320 35 53 50 4.8 50.3 1050 40 38 38 37 37.7 850 45 26 25 24 25 690 50 17 17 18 17.3 580 The temperature of the water stayed a constant of 20 degrees throughout the experiment. Analysis The graphs that I have drawn from my results confirm my prediction that as light intensity increases, so does the rate of photosynthesis. All of my results fall into this pattern. This is because the energy of the light is used to drive the reaction and obviously the closer the light is, the more energy given to the plant. Also the light would reach a larger surface area of the plant as it is more focused. I can also see from my results that after a certain light intensity, the graph begins to curve and level off, which shows that the plant can only absorb so much light energy and then any increase after this point does not affect the reaction. Therefore light stops being a limiting factor to the...

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