9352091
Description
Mind Map by Lilac Potato, updated more than 1 year ago
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Created by Lilac Potato
almost 7 years ago
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C9 - Atmosphere
- Evolution of atmosphere
- Phase 1 - volcanoes
gave out gases
- Early atmosphere
mostly carbon dioxide,
virtually no oxygen
- Like Mars and Venus
- Like Mars and Venus
- Some nitrogen, water
vapour, small amounts of
ammonia and methane
- Phase 2 - oceans,
algae and green plants
absorbed CO_2
- Water vapour
condensed
into oceans
- Carbon dioxide dissolved
in oceans, formed
sediments on seabed
- Carbon dioxide dissolved
in oceans, formed
sediments on seabed
- Algae and green plants
absorbed carbon dioxide so
they could do photosynthesis
- Crude oil and natural
gas formed from
deposits of plankton
- Coal is sedimentary
rock made from thick
plant deposits
- Phase 3 - green plants and
algae produced oxygen
- Photosynthesis
- Algae evolved first
then green plants
- As oxygen built up, more
complex life evolved
- 200 million years ago,
atmosphere reached composition
similar to what it is today
- 80% nitrogen, 20% oxygen, small
amounts of carbon dioxide,
water vapour and noble gases
- 80% nitrogen, 20% oxygen, small
amounts of carbon dioxide,
water vapour and noble gases
- Photosynthesis
- Water vapour
condensed
into oceans
- Early atmosphere
mostly carbon dioxide,
virtually no oxygen
- Phase 1 - volcanoes
gave out gases
- Greenhouse gases/
climate change
- Methane, carbon dioxide and water
vapour act like insulating layer
- Don't absorb short wavelength
radiation, do absorb long wavelength
and re-radiate it, back towards earth
- Polar ice caps could
melt, rise in sea levels
- Changes in rainfall pattern
- Methane, carbon dioxide and water
vapour act like insulating layer
- Carbon footprints
- Measure of amount of carbon dioxide
and greenhouse gases released over
full life cycle of something
- Reducing
- Renewable sources used
instead of fossil fuels
- Using more
efficient processes
- Tax based on amount
of greenhouse gases
things emit
- Cap on emissions
- Technology that
captures CO_2 before it
gets released
- Renewable sources used
instead of fossil fuels
- Difficult because some
don't want to reduce
- Measure of amount of carbon dioxide
and greenhouse gases released over
full life cycle of something
- Air Pollution
- Carbon dioxide and water
vapour released in
complete combustion
- Incomplete combustion, particulates of
carbon and unburnt fuel are released
and carbon monoxide
- Particulates get stuck in
lungs, respiratory problems
- Global dimming, reflection of
sunlight back into space
- Carbon monoxide dangerous and
stops blood transporting oxygen
- Particulates get stuck in
lungs, respiratory problems
- Sulphur dioxide and nitrogen
oxides cause acid rain
- Kills plants, damages buildings, corrodes
metals, causes respiratory problems
- Kills plants, damages buildings, corrodes
metals, causes respiratory problems
- Carbon dioxide and water
vapour released in
complete combustion
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