Zusammenfassung der Ressource
The Earth, Sea and Atmosphere
- C1.1 The Early Atmosphere
- first atmosphere caused by volcanoes
- lots of carbon dioxide
- lots of water vapour
- little oxygen
- some other gases
- ocean formation
- earth cooled
- water vapour condensed
- scientists unsure about early composition
- no humans
- conflicting evidence
- C1.2 A Changing Atmosphere
- photosynthesis
- increased oxygen levels
- decreased carbon dioxide levels
- carbon dioxide levels reduced
- dissolved into oceans
- marine organisms shells
- C1.4 The Atmosphere Today
- composition
- causes for change
- human activity
- burning fossil fuels
- adds carbon dioxide
- adds sulphur dioxide
- deforestation
- adds carbon dioxide
- reduces oxygen levels
- farming
- adds methane
- volcanic activity
- adds carbon dioxide
- adds sulphur dioxide