2.5 Carbon Cycle

2.5 Carbon Cycle

1. Important carbon compounds

   • Biomolecules
     • DNA
     • Proteins
   • CaCO⌄3
     • Limestone
   • CO⌄2
     • Greenhouse Gases (GHG)
     • Atmosphere
   • CH⌄4
     • Methane
     • GHG
   • Hydrocarbons
     • Fossil Fuels

2. Carbon (C)

   • Organic
     • Biomass
       • Plants/Animals
   • Inorganic
     • Fossil fuels
       • Oil/Coal
   • Chemically Versatile
   • Present in all life forms
   • Cycle through the earth by the Carbon cycle

3. Origins of C on Earth

   • Earth's interior
     • Found in the mantle
   • Plate boundaries
   • Stores
     • Biomass
     • Ocean
       • CO⌄2 dissolved in oceans
   • Carbon Removal
     • Sedimentary rock
     • Atmosphere
       • Trees photosynthesis (CO⌄2 ∴ removed form the atmosphere)

4. Major Stores of Carbon

   • Biosphere
     • Plant litter
       • 1) Leaves falls off plants
     • Living vegetation
     • Soil humus
       • 2) Leaves then become soil humus
     • Animals
     • Peat
       • 3) Eventually becomes peat
   • Lithosphere (rock)
     • Crust + upper most of mantle
     • Inorganic
       • Fossil fuels
       • Limestone
     • Stores
       • Marine
       • Soil
       • Fossil fuels
       • Peat
     • Organic
       • Humid substances
         • Decaying material
   • Hydrosphere
     • Oceans
       • Dissolved in CO⌄2
     • Organisms
       • Plankton
       • Plants
       • Fish
     • Stores in water (Levels)
       • Surface
         • Plants to photosynthesise
       • Intermediate
         • Deeper water
       • Living organic matter
         • Fish/Plankton
   • Atmosphere
     • Human Activities
       • GHG
         • CO₂
       • Global warming
         • Increase conc. of CO₂ in atmosphere
     • CO₂
       • 0.04٪ in Atmosphere
       • Controls Earth's temp
     • Mauna Loa Curve
       • Created in Hawaii has been measuring CO₂ levels for 50yrs to produce the graph

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