Unit 2: The Atmosphere - Gases in the Atmosphere

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1. How does nitrogen support life?

  • Used as nutrients for plants
  • Used in respiration
  • Blocks harmful UV rays
  • Used in photosynthesis
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Other questions in this quiz

2. What percentage, on average, of the air is nitrogen?

  • 57%
  • 21%
  • 78%
  • 76%

3. Which of these gases is created using UV radiation?

  • Ozone
  • Sulphur Dioxide
  • Carbon Monoxide
  • Hydrogen

4. What is the formula of methane?

  • CH4
  • CH
  • CH3
  • C4H4

5. Why has the percentage of hydrogen decreased from the early atmosphere to now?

  • It has been trapped underground
  • It's escaped from the atompshere
  • It dissolved in oceans and rivers
  • Human activity

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