Photosynthesis is a process in which green plants utilise the energy from the sun to change water, carbon dioxide and minerals into oxygen and organic composites. The process occurs when water is absorbed by the roots of green plants and is transported to the leaves by the xylem. Then carbon dioxide is acquired from air that enters the leaves through the stomata and disperses to the cells containing chlorophyll.
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Photosynthesis happens when water is absorbed by the roots of green plants. Carbon dioxide is taken by the air that enters and leaves through the stomata and diffuses to the cells containing chlorophyll. Then, the chlorophyll is change to a active energy of light and can be stored as food. You can find more information here: http://www.factmonster.com/ipka/A0775714.html