Conditions For Life on Earth

HideShow resource information
  • Created by: Aishah.a
  • Created on: 07-12-12 18:00
View mindmap
  • 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
    • 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. 
        •  early organisms lived in the oceans where water protected them from the UV light.
      • 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)
  • living organisms have maintained suitable temperatures by removing CO2 from the atmosphere.

Comments

No comments have yet been made

Similar Environmental Science/Studies resources:

See all Environmental Science/Studies resources »See all resources »