The proportions of different gases in the atmosphere
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What is in the atmosphere?

What is in the atmosphere?

Bar model of 100 parts of dry air showing 78 parts nitrogen, 21 parts oxygen and 1 part other gases, with GCSE approximations of about four-fifths nitrogen and about one-fifth oxygen

The atmosphere is the mixture of gases surrounding Earth. Air is a mixture, not a single substance, so we describe how much of each gas is present by its proportion.

The proportions of different gases in the atmosphere Lesson

  1. GCSE
  2. /Chemistry
  3. /The proportions of different gases in the atmosphere