Other questions in this quiz

2. What percentage of the modern atmosphere is oxygen?

  • 63%
  • 21%
  • 80%
  • 19%

3. What percentage of the modern atmosphere is Carbon dioxide?

  • 78%
  • 0.4%
  • 0.04%
  • 1%

4. What increased CO2 in the early atmosphere?

  • Respiration
  • Photosynthesis
  • Volcanic activity
  • Pollution and fossil fuels being burnt

5. Which gas is missing from the early atmosphere?

  • Carbon dioxide
  • Ammonia
  • Oxygen
  • Water vapour

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