Plate Tectonics

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Across
  1. 3. the thickest layer made of semi-molten rocks
  2. 5. flow, a fast-moving current of hot gas and volcanic materials
  3. 7. plates moving toward each other
  4. 10. mountains, when plates meet and mountains form under pressure
  5. 11. semi-fluid material within the earth
  6. 12. the innermost and hottest part of Earth's structure
  7. 14. plates gliding past each other
  8. 15. volcanic ash saturated with water
  9. 17. a sudden and rapid vibration of the earth's crust
  10. 18. ash and dust cemented together
  11. 19. small rock fragments
Down
  1. 1. lava that is light and runny
  2. 2. the name of the super-continent
  3. 4. plates moving away from each other
  4. 6. lava that is thick and immobile
  5. 8. a structure linking the earth's interior to the surface
  6. 9. solid materials ejected from a volcano
  7. 13. the current occurring in the mantle
  8. 16. the thinnest layer on which we live
  9. 20. magma which has made its way to the surface