Earthquakes

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Across
  1. 2. when two plates are separated
  2. 4. most popular way to measure earthquake magnitude
  3. 7. ground shaking (the name of this crossword)
  4. 9. the edge of a plate
Down
  1. 1. massive pieces of the earth
  2. 3. where the earthquake occurs on the earth's surface
  3. 5. when two plates smash into each other; one goes under the other
  4. 6. plates settling into their new places
  5. 8. when two plates slide past each other (but not smoothly!!!!!)