plate motion crossword puzzle

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Across
  1. 2. the outside or top layer of something
  2. 4. something we observe to be similar over and over again
  3. 5. the place where two plates meet(two words)
  4. 6. when two plates move away from each other
  5. 8. when 1 plate goes underneath another plate and is destroyed in the mantle
  6. 10. the slow pulling apart of land. This is caused by plate motion
  7. 11. when two plates are moving towards each other
  8. 14. hot liquid rock on Earth’s surface
  9. 15. one of the large sections of hard, solid rock that makes up Earths outer layer
  10. 16. the layer of soft solid rock underneath Earth’s surface
  11. 17. this person invented the idea of plate tectonics (Alfred ____________)
  12. 19. a long deep indentation in the ocean floor formed when 2 plates move together
Down
  1. 1. an underwater mountain chain formed at divergent plate boundaries(three words)
  2. 3. Earths outermost layer of solid rock that is underneath the soil, vegetation, and water(two words)
  3. 7. a sudden shaking of Earth's crust
  4. 8. A scientific instrument used to record data from earthquakes
  5. 9. evidence of life from the past
  6. 12. the sudden pushing out of something
  7. 13. hot liquid rock below the surface of Earth
  8. 18. how often or fast something happens