The affect of light on the rate ofphotosynthesis of a piece of pondweed.

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Photosynthesis Investigation

Investigate the affect of light on the rate of

photosynthesis of a piece of pondweed

I am going to investigate how light will affect the rate of photosynthesis of pondweed.

I predict that as the light becomes less intense, I do this by moving the light away from the pondweed, the rate of photosynthesis will decrease.

The formula for photosynthesis is:

6CO2 + 6H2O                        C6O12H6 + 6O2

Carbon Dioxide + Water                        Glucose + Oxygen

There are 3 major factors that limit the rate of photosynthesis, these are:

  • Temperature
  • Amount of Carbon Dioxide
  • Light Intensity

The only factor that we are able to measure successfully in school is the affect of light on the rate of photosynthesis, so we have to believe that the level will remain the same. This is very unlikely to happen so we could end up with a few rouge results.

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        As the plant is moved closer to the light source. The light intensity increases so the rate of photosynthesis should increase.

As the plant is moved further away from the light the light intensity decreases and therefore the rate of photosynthesis should also decrease.

Because oxygen is a product of photosynthesis we will measure the amount of bubbles against time. This is very inaccurate as no two bubbles will contain the same amount of oxygen, but it should give us some ...

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