Plate motion crossword

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Across
  1. 2. earth’s outermost layer of hard solid rock
  2. 5. an object, diagram, or computer program that helps us understand
  3. 6. something we observe over and over
  4. 8. the outside top layer of something
  5. 9. a long deep indentation in the ocean floor
  6. 11. a natural spring
  7. 16. two plates moving apart from one another
  8. 18. an extinct reptile that lived 300 million years ago
  9. 19. slow pulling apart of land that is caused by plate motion
Down
  1. 1. boundary the place were two plates meet
  2. 3. how often or fast something happens
  3. 4. A large piece of land such as Asia or North America
  4. 7. a feature that forms on the surface of a plate
  5. 10. two plates moving toward the same place
  6. 12. a set of interacting parts
  7. 13. to examine in detail
  8. 14. hot liquid rock on surface
  9. 15. a sudden shaking of earth’s surface
  10. 17. a bone left by dinosaurs
  11. 18. hot liquid rock below surface