Earth's Atmosphere

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  • Earth's Atmosphere
    • Early Atmosphere
      • Volcanoes
        • Water vapour
          • Cools
            • Condenses
              • Rain forms the oceans
        • Carbon Dioxide
          • Tiny plants start photo-synthesis
            • CO2 levels drop, O2 levels rise
          • CO2 dissolves into the sea, levels drop
            • Marine creatures use CO2 to build shells
              • Calcium carbonate
    • Today's Atmosphere
      • Oxygen 21%
      • Carbon Dioxide 0.04%
        • Deforestation
        • Combustion
      • Nitrogen 78%
      • Argon 0.9%

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