The early atmosphere

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1. How does oxygen get added to our atmosphere?

  • The Earth cools and oceans form.Forms of life evolve in the oceans and photosynethesis begins.Oxygen builds up in the oceans.Oxygen builds up in the atmosphere.
  • The volcanoes gave out oxygen.
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Other questions in this quiz

2. The Earths early atmosphere did not contain what?

  • Water Vapour
  • Oxygen
  • Volcanoes
  • Carbon dioxide

3. Today the Earths atmospherehas much less than 1% carbon dioxide and has more than 21% oxygen this means that?

  • Carbin dioxide has been removed from the atmosphereand oxygen has been added to the atmosphere.
  • Todays oxygen has been removed from the atmosphere and carbon dioxide has been added

4. What are the two gases present in the largest amounts in the Earths early atmosphere?

  • Air
  • Water vapour and carbon dioxide
  • Oxygen
  • Chlorine

5. The Earths early atmosphere was formed by gases produced from what?

  • Plants
  • Volcanoes
  • Clouds


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