Conditions For Life on Earth
- Created by: Aishah.a
- Created on: 07-12-12 18:00
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- Conditions for Life on Earth
- Survival of Life on Earth
- Suitable Abiotic Factors
- Availbility of water
- transport
- High specific heat capacity
- Appropriate temp range
- Liquid water
- enzymes (denature if temp is too high)
- Suitable Ambient Gases
- CO2 - Photosynthesis
- N2 - Proteinsyntheis
- O2 - Respiration
- Light
- Sunlight
- heat production
- little harmful UV and ionising radiation
- Availbility of water
- Suitable Abiotic Factors
- Environmental change
- O2 And ozone
- continued presence of O2 relied on processes that continually replace it
- photosynthetic
plants gradually released much larger amounts of oxygen.
- oxygen
absorbed UV light from the sun, causing the oxygen molecules to split.
- monatomic oxygen that reacted with diatomic oxygen to produce ozone.
- oxygen
absorbed UV light from the sun, causing the oxygen molecules to split.
- photosynthetic
plants gradually released much larger amounts of oxygen.
- early organisms lived in the oceans where water protected them from the UV light.
- continued presence of O2 relied on processes that continually replace it
- CO2 and Temp control
- released in atmosphere by volcanoes
- essential greenhouse gas, heat in the atmosphere
- Without - too cold to support life
- excessive - rise too high for life to survive.
- stored in fossil fuels and carbonate rocks
- living organisms have maintained suitable temperatures by removing CO2 from the atmosphere.
- Transpiration from leaves is unavoidable as the stomata must be open to allow exchange of gases (CO2)
- O2 And ozone
- Survival of Life on Earth
- living organisms have maintained suitable temperatures by removing CO2 from the atmosphere.
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