science B4

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  • Created by: Alice
  • Created on: 05-05-13 13:18

photosythesis:

it is how plants make energy. green plants use sun light to create energy in chemical form. it produces glucose which fules the plant. the equation for photosynthesis is......

Carbon Dioxide+Water-----light energy--> glucose+oxygen

oxygen is the waste product of this chemical reaction. the plant then creates protein, cellulose and starch from from the glucose.

the reaction of photosythesis:

it is a number of reactions. firt the chemical chlorophyll absorbes light energy. this then drives several reactions, which eventually builds the molecules of glucose.

Phytoplankton also use photosynthesis, and proved 60% of the earths oxygen.

Diffusion:

water is essential :

it keeps chemicals in solution

takes part it important reations

keeps cells in correct shape

and acts acts as a heat store

the human body is

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