Photosynthesis

The way plants makes its food is a very important kind ofnatural chemical reaction. It takes in carbon dioixe frm the air and turs thenm into carbohydrates the food for the plant. It also produces oxygen as part of the process. A chemical in a plant's leaves, called cholorophyll uses the energy from sunlight to carry out the chemical reaction.
Photosynthesis is the process by which plants use the energy from sunlight to produce sugar, which cellular respiration converts into the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen.

6H2O                 +                6CO2      ----->      C6H12O6    +          6O2

Six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen