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The effects of light intensity on the rate of photosynthesis in Elodea.

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  • Essay length: 2432 words
  • Submitted: 10/03/2004
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GCSE Green Plants as Organisms

The first 200 words of this essay...

The effects of light intensity on the rate of photosynthesis in Elodea

Aim

I aim to investigate the effects of the quantity of light and thus the light intensity on the rate of photosynthesis in Elodea.

Background

Photosynthesis is the production of food compounds from carbon dioxide and water by green plants using energy from sunlight, absorbed by chlorophyll ie. Photosynthesis is how plants feed.

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6CO2 + 6H2O à C6H12O6 + 6O2

Raw materials Products

ie. Green plants make organic substances from inorganic substances.

In order to keep the equation for photosynthesis simple, glucose is shown as the only food compound produced. However, this does not mean that glucose is not the only food compound produced.

The process of taking in and giving out gases is known as gaseous exchange. When green plants photosynthesise, they take in CO2 and give out O2. This only happens in daylight when light is available as an energy supply. The exchange of gases in green plants in light is the opposite of that of animals; however this does not mean that green plants do not respire. During daylight, plants photosynthesise and respire

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