Plate tectonics

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Across
  1. 3. Vibrations that travel through Earth during an earthquake.
  2. 6. Spreading – The process where new ocean crust forms at mid-ocean ridges.
  3. 8. A place where two tectonic plates collide.
  4. 9. The thin, outermost layer of Earth.
  5. 10. Hot, melted rock inside Earth.
  6. 13. The idea that continents move slowly over time.
  7. 14. The rigid outer part of Earth, including the crust and upper mantle.
  8. 16. The shaking of Earth's surface caused by plate movement.
  9. 17. A place where two tectonic plates slide past each other.
  10. 18. The center of Earth, made of very hot metal.
  11. 20. An underwater mountain range formed by plate movement.
Down
  1. 1. The process where one plate sinks beneath another.
  2. 2. Magma that reaches Earth's surface.
  3. 4. A mountain that forms when magma reaches the surface.
  4. 5. Large pieces of Earth's lithosphere that move over time.
  5. 7. A soft layer of the mantle that allows tectonic plates to move.
  6. 11. The thick layer of rock beneath the crust.
  7. 12. A place where two tectonic plates move apart.
  8. 15. A deep valley in the ocean caused by subduction.
  9. 19. A crack in Earth's surface where movement occurs.