Unit 2: The Atmosphere - The Evolution of the Atmosphere

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1. By which process was oxygen first released into the atmosphere?

  • Oxidation
  • Anaerobic Respiration
  • Photosynthesis
  • Aerobic Respiration
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2. Which of these gases do volcanoes release?

  • Nitrogen Dioxide
  • Methane
  • Oxygen
  • Argon

3. What is the purpose of the ozone layer?

  • To block harmful microwaves
  • To keep UV radiation on Earth
  • To block harmful UV radiation
  • To block visable light

4. What sort of electromagnetic radiation split molecules of oxygen to form ozone?

  • Visible Light
  • X-Rays
  • Ultraviolet
  • Microwaves

5. Where did life first evolve?

  • Underground
  • In the rainforest
  • In the oceans
  • In the sky


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