The Water Cycle

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Plants The Carbon Cycle

• Plants take in carbon dioxide and convert it to
  sugar which can be stored until used for energy.
• This process is called photosynthesis.

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Photosynthesis

• CO2 H2O sunlight yields O2 C6H12O6

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Plants The Carbon Cycle

• Plants release carbon dioxide as a waste product
  when they convert their stored sugar to chemical
  energy.
• This process is called respiration.

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Respiration

• C6H12O6 O2 yields CO2 H2O energy

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Animals The Carbon Cycle

• Animals eat carbon contained in animal and plant
  tissues and release carbon dioxide as a waste
  product.
• This process is respiration.

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Decay The Carbon Cycle

• Decomposers release the carbon from dead plant
  and animal tissues back into the atmosphere.

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Fossil Fuels The Carbon Cycle

• Over millions of years fossil fuels may form from
  the buried remains of plants and animals.

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Fossil Fuels The Carbon Cycle

• This carbon reenters the atmosphere during
  combustion.

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The Oceans The Carbon Cycle

• Dissolved carbon dioxide in sea water becomes
  deposited as calcium carbonate shells.

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The Oceans The Carbon Cycle

• Over millions of years, these shells form
  sedimentary rock.

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• Ocean deposits are the biggest sink of carbon on
  the planet.
• The Rock Cycle ultimately releases carbon stored
  in sedimentary rock.

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