The Atmosphere 2.0 / 5 based on 1 rating ? ChemistryThe earth and its atmosphereGCSEEdexcel Created by: Nicole MatherCreated on: 13-05-13 18:27 The Atmosphere Then: 90% carbon dioxide 10% water vapour and other gases Volcanic activity produced carbon dioxide = atmosphere Volcanic activity produced water vapour = oceans Now: 78% nitrogen 21% oxygen 1% carbon dioxide and other gases Carbon dioxide dissolved into oceans This dissolved further into marine organisms = carbonate rocks Primitive green plants photosynthesised = oxygen Changes: Volcanic activity = sulphur dioxide Lightening = nitrous oxide Burning Fossil Fuels = carbon dioxide, carbon monoxide and sulphur dioxide Deforestation = less resources to remove carbon dioxide via photosynthesis Farming = methane 1 of 1
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