B2 -photosynthesis
- Created by: Charlotte
- Created on: 08-04-13 17:54
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- Photosynthesis
- Photosynthesis can only be carried out by green plants and algae
- Chlorophyll in the chloroplasts absorbs the Sun's light energy
- The equation for photosynthesis is:
- carbon dioxide+water=glucose+oxygen
- the process for photosynthesis is:
- 1. Carbon dioxide is taken in by the leaves, and water is taken up by the roots
- 2.The chlorophyll traps the light energy needed for photosynthesis
- 3. This energy is used to convert the carbon dioxide and water into glucose (a sugar).
- oxygen is released as a by-product of photosynthesis
- some of the glucose is converted into insoluble starch for storage
- By testing leaves with iodine solution, we can identify the starch in the leaf and show that photosynthesis has occurred. Only green parts of the leaf will turn the iodine solution blue/black to show that starch has been made
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