2136686
Description
Mind Map by MillicentAB, updated more than 1 year ago
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Created by MillicentAB
over 9 years ago
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Chemistry 1
- The Evolution of the Atmosphere
- The First Two Billion Years
- Any atmosphere was 'boiled' away because of the heat
- Eventually a thin crust formed but volcanoes were still erupting
- The volcanoes gave out CO2, H20 and N2 which was how the 1st atmosphere was formed
- The early atmosphere was mostly CO2 and H2O with almost no O2
- The oceans formed when the water vapour condensed as the Earth cooled
- Any atmosphere was 'boiled' away because of the heat
- The next two billion years
- Green plants evolved and covered the surface of the Earth
- A lot of CO2 dissolved into Oceans. The green plants removed CO2 and produced O2 through photosynthesis
- When the plants died the Carbon (from the CO2) they had removed from the air became 'locked' in sedimentary rocks as fossil fuels
- Green plants evolved and covered the surface of the Earth
- The Evolution of complex organisms
- The build up of O2 killed some of the earliest organisms allowing more complex ones to grow.
- There is virtually no CO2
- The build up of O2 killed some of the earliest organisms allowing more complex ones to grow.
- The First Two Billion Years
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