Chemistry, OZ Revision Notes


The Atmosphere

  • Extends 100km above Earth

  • Troposphere and Stratosphere most important

  • 90% of all molecules in troposphere

Composition of the Troposphere
Gas Concentration
Nitrogen 78%
Oxygen 21%
Argon 1%
Carbon Dioxide 400ppm
Composition of the Atmosphere

Atmospheric Pollutants

Gas Human Source
Carbon Dioxide Combustion, Deforestation
Methane Cattle, Landfill, Rice Paddy Fields
Nitrous Oxide Fertilising and Changes in Land Use
Carbon Monoxide Incomplete Combustion
Nitrogen Oxides Internal Combustion Engines