C11 - Earth's Atmosphere
C11 - Earth's Atmosphere...
- Early Atmosphere:
- water vapour cooled and condensed - forming oceans.
- Carbon dioxide and methane - Volcanoes
Water Vapour - 74%
Carbon dioxide - 12%
Nitrogen - 5%
Other - 9%
Volcanoes released methane, CO2, Nitrogen - created atmosphere.
No oxygen at this time
Ocean formed as water vapour condensed when the Earth cooled.
Would have remained stable if no living things came along....
How the Atmosphere changed....
increase in oxygen and decrease in CO2 (Photosynthesis)
Life started - bacteria and they used chemicals as energy.
Bacteria, algae and plants produced oxygen in atmosphere.
oxygen poisened poisend things that weren't used to it.
Locked up carbon...
CO2 dissolves in Oceans
CO2 absorbed by plants - organic matter
Dead organic matter - heated and crushed into rock and fossil fuels.
Bye Methane! - Oxygen took it over.
- CO2 increasing - burning fossil fuels
- Methane increase - agricultre, landfil.
- Water - clouds trap heat
- Human demand
Sulfur dioxide - Asthma, inflames airways of lungs.
Carbon menoxide - Starved of oxygen, drowsy, dizzy, loose conciousness, sticks to red blood cells.
Nitrogen oxide - Astmha, acid rain.
Particulates - Damage lung cells, causes cancer.