Plate Motion

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Across
  1. 4. one of the very large sections of hard solid rock that make up Earth's outer layer
  2. 6. any of the many processes in which gas, lava and ash are pushed out on the surface of Earth
  3. 7. something we observe to be similar over and over again
  4. 9. went extinct 260 million years ago
  5. 11. a diagram that shows what the inside of something looks like
  6. 12. is an underwater mountain range formed when two plates move apart
  7. 15. Earth's outermost layer of hard, solid rock that is underneath the soil, vegetation and water
  8. 17. big machines that drill into the Earth to collect samples of what is underground
  9. 18. how often or fast something happens
  10. 19. a long, deep indentation in the ocean floor formed when two plates move together
Down
  1. 1. ___ are connected to the plate. The hard solid rock is thicker.
  2. 2. ___ happen on or near a plate boundary
  3. 3. the place where two plates meet
  4. 5. a sudden shaking of Earth's surface
  5. 8. plates move _____ then earthquakes can happen next
  6. 9. the layer of soft, solid rock underneath Earth's plates
  7. 10. evidence of life from the past
  8. 13. ___ boundary are when plates move apart in different directions
  9. 14. ___ boundary are when plates move towards the same place
  10. 16. as the plates move away, the mantle pushes __ to fill the gaps