Zusammenfassung der Ressource
The Atmosphere - GCSE Chemistry C1
- Today's Atmosphere
- Composition
- 78% Nitrogen
- 21% Oxygen
- 0.04% Carbon Dioxide
- 0.96% Other gases
- Components of air can be separated by:
- Fractional distillation of liquid air
- History of the atmosphere
- Original atmosphere formed by volcanic activity
- 4.5 billion years ago
- Original atmosphere contained
- Carbon Dioxoide
- Water vapour
- Little to no oxygen
- Small amounts of other gases such as NH3, CH4
- Earth cooled, water vapour
condensed to form oceans
- Decrease in CO2 levels
- CO2 dissolved into oceans
- CO2 incorporated into marine organisms
- Through food
- Carbonate rocks
- Primitive plants photosynthesising
- 6CO2(g) + 6H2O(l) --> C6H12O6(aq) + 6O2(g)
- Increase in O2 levels
- The Atmosphere is still changing due to:
- (Livestock) Farming
- Methane
- Volcanic Eruptions
- Sulphur dioxide
- Carbon Dioxide
- Combustion
- Carbon Dioxide
- Deforestation
- Decrease in photosynthesis
- More CO2
- Less O2
- Global Warming
- CO2 is a greenhouse gas
- Absorbs heat, maintains temperature
- As CO2 levels have increased over
the past 200 years, there has been
an increase in average global
temperature
- Correlation, but not a causal link
- Reducing CO2 in the atmosphere
- Iron seeding of oceans to fertilise
phytoplankton
- Developing means of converting CO2 into
hydrocarbons to re-use as fuels
- Alternative forms of energy productions such as wind farms