The carbon cycle

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  • The carbon cycle
    • Powered by photosynthesis. green plants use the carbon from co2 in the air to make carbohydrates, fats and proteins.
      • Eating passes the carbon compounds in the plant along to animals in a food chain or web.
        • Both plant and animal respiration respiration while the organisms are alive release C02 back into the air.
          • Plants and animals eventually die and decompose or are killed and turned into useful products.
            • When plants and animals decompose they are broken down by bacteria and fungi. These decomposers release CO2 back into the air by respiration, as they break down the material.
              • Some useful plant and animal products eg wood are burned, this also releases CO2 back into the air.

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