Other questions in this quiz

2. What did the Green Plants do to make Oxygen gradually increase?

  • Green plants evolved and took all the oxygen.
  • When they evolved they took in the CO2 and produced Oxygen (O) by photosynthesis.
  • Nothing they made it decrease.

3. What are the two types of igneous rocks?

  • Extrusive, Intrusive
  • Migneous, Leme
  • Exinsive, inexive

4. Why couldn't any atmosphere form?

  • Space wasn't ready.
  • It was so hot that any atmosphere boiled away.
  • It was so cold that any atmosphere froze.

5. What did the oxygen create?

  • Mountains.
  • Ozone layer (O3)
  • Oceans.


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