2.5 Carbon Cycle

Important carbon compounds
1. Biomolecules
  1. DNA
  2. Proteins
2. CaCO⌄3
  1. Limestone
3. CO⌄2
  1. Greenhouse Gases (GHG)
  2. Atmosphere
4. CH⌄4
  1. Methane
  2. GHG
5. Hydrocarbons
  1. Fossil Fuels
Carbon (C)
1. Organic
  1. Biomass
    1. Plants/Animals
2. Inorganic
  1. Fossil fuels
    1. Oil/Coal
3. Chemically Versatile
4. Present in all life forms
5. Cycle through the earth by the Carbon cycle
Origins of C on Earth
1. Earth's interior
  1. Found in the mantle
2. Plate boundaries
3. Stores
  1. Biomass
  2. Ocean
    1. CO⌄2 dissolved in oceans
4. Carbon Removal
  1. Sedimentary rock
  2. Atmosphere
    1. Trees photosynthesis (CO⌄2 ∴ removed form the atmosphere)
Major Stores of Carbon
1. Biosphere
  1. Plant litter
    1. 1) Leaves falls off plants
  2. Living vegetation
  3. Soil humus
    1. 2) Leaves then become soil humus
  4. Animals
  5. Peat
    1. 3) Eventually becomes peat
2. Lithosphere (rock)
  1. Crust + upper most of mantle
  2. Inorganic
    1. Fossil fuels
    2. Limestone
  3. Stores
    1. Marine
    2. Soil
    3. Fossil fuels
    4. Peat
  4. Organic
    1. Humid substances
      1. Decaying material
3. Hydrosphere
  1. Oceans
    1. Dissolved in CO⌄2
  2. Organisms
    1. Plankton
    2. Plants
    3. Fish
  3. Stores in water (Levels)
    1. Surface
      1. Plants to photosynthesise
    2. Intermediate
      1. Deeper water
    3. Living organic matter
      1. Fish/Plankton
4. Atmosphere
  1. Human Activities
    1. GHG
      1. CO₂
    2. Global warming
      1. Increase conc. of CO₂ in atmosphere
  2. CO₂
    1. 0.04٪ in Atmosphere
    2. Controls Earth's temp
  3. Mauna Loa Curve
    1. Created in Hawaii has been measuring CO₂ levels for 50yrs to produce the graph

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2.5 Carbon Cycle

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