Earthquakes, Volcanoes, Plates!

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Across
  1. 2. One of the metals that makes up a large part of the molten core
  2. 7. These plates make up the earth's crust
  3. 8. This dormant volcano is visible from Elton Gregory
  4. 9. The boundary where earthquakes most commonly occur
  5. 11. One strategy to strengthen buildings by adding a "cushion" to the bottom of a building
  6. 16. This boundary causes mountains to form
  7. 18. Considered the center of the earthquake; where most damage occurs
Down
  1. 1. This boundary causes new crust to be made
  2. 3. The place where magma Sits under a volcano
  3. 4. the spot in the crust where an earthquake actually starts
  4. 5. This is the wave type that measures earthquakes
  5. 6. Also known as composite volcanoes, these erupt violently. Mt. St Helens is an example of one of these
  6. 10. The boundary between two plates
  7. 12. Where one plate slides under another one
  8. 13. Where the most destructive volcanoes often form
  9. 14. Ancient land mass
  10. 15. Semi-liquid that the plates slide around on
  11. 17. Shifting of the earth before an eruption