1878978
Description
Mind Map by greenchloe1998, updated more than 1 year ago
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Created by greenchloe1998
almost 10 years ago
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Early Atmosphere
- 1) VOLCANOES _The Earth is molten, any
atmosphere is boiled away.
- 1a) things start to cool and so a thin layer of crust is formed,
volcanoes erupt .
- 1b) volcanoes give out
Carbon dioxide and
water vapour.
- 1c) oceans formed when water
vapour condensed
- 1c) oceans formed when water
vapour condensed
- 1b) volcanoes give out
Carbon dioxide and
water vapour.
- Early atmosphere= mostly carbon
dioxide/ virtually no oxygen
- 1a) things start to cool and so a thin layer of crust is formed,
volcanoes erupt .
- 2) GREEN PLANTS_ a lot of early carbon
dioxide dissolved into the oceans.
- 2a) when marine animals developed they took in the carbon
dioxide, when they died they were buried under layers of sediment.
- The carbon dioxide
became locked up in
carbonate rocks.
- 2b) Green plants developed, they removed the carbon dioxide from the air and
produced oxygen.
- The oxygen levels gradually
increased.
- The oxygen levels gradually
increased.
- The carbon dioxide
became locked up in
carbonate rocks.
- 2a) when marine animals developed they took in the carbon
dioxide, when they died they were buried under layers of sediment.
- 3) OZONE LAYER_ The build up of oxygen
caused some organisms to die and others
to flourish.
- 3a) The ozone layer (created by the oxygen)
blocked harmful rays from the sun- allowing more
organisms to develop.
- very little
(0.04%)carbon
dioxide is left now.
- very little
(0.04%)carbon
dioxide is left now.
- 3a) The ozone layer (created by the oxygen)
blocked harmful rays from the sun- allowing more
organisms to develop.
- TODAYS
ATMOSPHERE :
Nitrogen-78%
oxygen 21% argon
and other gasses
1% carbon dioxide -
0.04%
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