A changing atmosphere

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  • A changing atmosphere
    • The amount of carbon dioxide in the atmosphere was reduced by:
      • the dissolution of carbon dioxide into the oceans.
        • The later incorporation of this dissolved carbon dioxide into marine organisms which eventually formed carbonate rocks.
    • About 1 million years ago, some organisms developed the ability to photosynthesise. Consequently the amount of oxygen in the atmosphere gradually increased. (Used Carbon Dioxide, released oxygen.)
    • BBC bitesize link


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