Plate Tectonics

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