Other questions in this quiz

2. the earliest atmosphere was formed by....

  • plants decaying
  • animals breathing
  • volcano activity
  • global warming

3. what brought water to Earth?

  • concentrated water vapour and comets
  • rain just fell

4. the earliest atmosphere is thought to have contained mainly....

  • nitrogen
  • neon
  • argon
  • carbon dioxide
  • carbonates

5. The earth was a molten ball of....

  • rock and water
  • rock and minerals
  • lava and rock

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