Our Restless Earth

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Across
  1. 3. Where are most volcanic eruptions?
  2. 5. White, icy substance.
  3. 9. The part in the earth closet to the core.
  4. 10. How many secondary tectonic plates are there?
  5. 11. The plate boundaries that are sliding against one another.
  6. 13. Takes up 70% of the earth.
  7. 15. The plate boundaries that are crashing against each other.
  8. 17. The plates that separate the earth.
Down
  1. 1. Red/orange substance that comes out of a volcano.
  2. 2. The plate boundaries that are moving away from each other.
  3. 4. Where is goes from cool to heat.
  4. 6. The part in the earth closet to the crust.
  5. 7. The middle bit of the Earth.
  6. 8. A major volcano.
  7. 12. A type of land form.
  8. 14. Are tectonic plates moving?
  9. 16. A very famous land form.
  10. 18. The outer layer of the Earth.
  11. 19. A mountain with a flat top on the cliff side.
  12. 20. How many primary tectonic plates are there?