Biology: Analysis of Bubble Rate in Pondweed

Photosynthesis is an organic chemical reaction which green plants use to produce glucose from carbon dioxide and water. Its equation is

However, carbon dioxide and water cannot react on their own “They have to be given energy to make them combine. The energy which green plants use for this is sunlight energy”. We can determine that if sunlight gives the reaction energy, and increase in the intensity of the sunlight will give the reaction more energy, which will speed the reaction up. We can therefore safely predict that as the intensity of the light increases, so too will the speed of the reaction.

The key variables that could affect my experiment are the temperature at which the water is, a thermometer will be used and if the temperature rises or falls we will need to restart because this could affect the whole experiment. The size of the pondweed must also remain the same because the bigger the pondweed the more amount of bubbles that will come of

The other key variables that need to be controlled are the temperature and the size of the pondweed:

The variable I will investigate is going to be the light distance because the distance is also in connection with the light intensity and this is what we are investigating.

I will be taking 8 measurements so I get enough data to produce an accurate graph. I will then repeat each measurement twice to make an average and to make sure I am measuring accurately because if the two different readings are completely different then I will know I must have done something wrong. If they are completely different I will make more measurements and discard the widely different ones.

Some topics in this essay:
Prediction Hypothesis, Key Variables, Information Photosynthesis, light intensity, bubbles produced, key variables, distance light, canadian pondweed, amount bubbles, size pondweed, light pondweed, carbon dioxide water, sunlight reaction energy, pondweed produces bubbles, photosynthesis canadian pondweed, 1 minute, pondweed produces, rate photosynthesis canadian,