• Question: What are the main gases in our atmosphere

    Asked by Jeff to Alison, Hannah, Jonny, MarthaNari, Paul on 23 Jun 2015.
    • Photo: Jonny Brooks-Bartlett

      Jonny Brooks-Bartlett answered on 23 Jun 2015:

      Here is a list for you along with the amount in % 🙂

      Nitrogen, N2 78.08%
      Oxygen, O2 20.95%
      Argon, Ar 0.93%
      Carbon dioxide, CO2 0.033%
      Neon, Ne 0.0018%
      Helium, He 0.00052%
      Methane, CH4 0.0002%
      Krypton, Kr 0.00011%
      Nitrogen(I) oxide, N2O 0.00005%
      Hydrogen, H2 0.00005%
      Xenon, Xe 0.0000087%
      Ozone, O3 0.000001%

    • Photo: Paul Brack

      Paul Brack answered on 23 Jun 2015:

      The atmosphere is made up mostly of oxygen and nitrogen. Oxygen is about 21% of the atmosphere, and nitrogen 78%. The rest is mainly argon. Carbon dioxide is only a tiny 0.04% of the earth’s atmosphere!

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