Chemistry 1 - created from Mind Map

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The early atmosphere

The Atmosphere today

Virtually no oxygen

Volcanoes gave out CO2 and water vapour

Ozone layer

Water vapour condensed = Oceans

Most CO2 dissolved in oceans

Some CO2 taken in by marine organisms (Carbonate rocks)

Green plants took in CO2 and produced Oxygen through photosynthesis

Blocked harmful rays from the sun

Complex organisms like humans developed

Human Activity

Volcanic Activity

Antarctic ice cores

Burning fossil fuels

Deforestation

Livestock farming

Sulfur Dioxide = Volcanic Smog

CO2