photosynthesis

Rate of photosynthesis

I have worked out the gradient, which tells me the rate of photosynthesis, using the following formula:

Number of bubbles
Time taken (mins)


I obtained the subsequent results,


Height held from lamp (cm) Rate of photosynthesis (bubbles per minute)
10 35.2 = 35 (to 2 dp)
15 28.6 = 29 (to2 dp)
20 22.4 = 22 (to 2 dp)
25 16.4 = 16 (to 2 dp)
30 13.2 = 13 (to 2 dp)
35 9





























Conclusion.

From the results and my graph, I am able to conclude that there is a relationship between the intensity of light and the rate of photosynthesis.
The smaller the distance between the lamp and pondweed, the greater the light intensity and therefore there was a higher rate of photosynthesis occurring, shown by the number of oxygen bubbles given off. When the pondweed was held...