effect of light intensity on rate of photosynthesis

step 1

cut elodea stem at an angle to ensure efficient oxygen production

step 2

allow elodea period of adjustment to reach temp of water bath and the light intensity

approx 1 min

step 3

count no of o2 bubbles released by elodea for 1 min

step 4

move light source closer and repeat step 2 and 3

step 5

repeat at distances of 1m, 80cm, 60cm, 40cm, 20cm and record results

results

100cm - 0

80cm-5

60cm-10

40cm-15

20cm-15

graph results