What's in the Air?

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  • Created by: Emma
  • Created on: 22-03-13 15:10

The Air

  • The atmosphere is divided vertically into four regions- the troposphere, the stratosphere, the mesosphere and finally the thermosphere.
  • The higher up you go, the less dense the atmosphere is.
  • The atmosphere is a mixture of many gases. 90% of all molecules in the atmosphere are found in the troposphere.

(http://www.4college.co.uk/as/atm/air3.gif)

The concentrations of the gases in the table above are measured in parts per million. This measure is adequate when small concentrations are involved. 35 ppm represents a

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