Environmental change due to the presence of life on earth
- Created by: tomkins_liam
- Created on: 29-11-15 11:30
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- How the presence of life on Earth has brought about environmental change
- Atmospheric Oxygen
- Small amount of oxygen released by the photolysis of water
- Later on, photosynthetic plants gradually released large amounts of oxygen
- Atmospheric Carbon Dioxide
- Naturally released into atmosphere by volcanoes
- Essential greenhouse gas
- Helps to retain heat in the atmosphere to support life
- The Water Cycle
- Heat energy from absorbed sunlight causes water in the sea to evaporate
- May be carried over land where it falls as rain then flows back into the sea
- Transpiration by plants returns water vapour to the atmosphere so it can be blown further inland
- Heat energy from absorbed sunlight causes water in the sea to evaporate
- Atmospheric Oxygen
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