Carbon Cycle


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•  Construct a diagram of the carbon cycle

The carbon cycle is a biogeochemical cycle whereby carbon is exchanged between the different spheres of the Earth

  • The four spheres are the atmosphere (air), lithosphere (ground), hydrosphere (water / oceans) and biosphere (living things)

Carbon is exchanged between a variety of forms, including:

  • Atmospheric gases – mainly carbon dioxide (CO2), but also methane (CH4)
  • Oceanic carbonates – including bicarbonates dissolved in the water and calcium carbonate in corals and shells
  • As organic materials – including the carbohydrates, lipids and proteins found in all living things
  • As non-living remains – such as detritus and fossil fuels

Different processes facilitate the cycling of carbon between the different forms (e.g. feeding, combustion, etc.)

The Carbon Cycle

carbon cycle