Plate Tectonics Crossword

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Across
  1. 1. Process where one plate sinks beneath another.
  2. 6. Curve of volcanic islands at a subduction zone.
  3. 9. Soft, flowing layer that tectonic plates float on.
  4. 10. Wegener’s idea that continents move over time.
  5. 12. Crack in Earth where movement causes earthquakes.
  6. 14. Where two tectonic plates meet.
  7. 15. Stationary plume of magma creating volcano chains.
  8. 17. Rigid outer layer of Earth broken into plates.
  9. 19. Type of boundary where plates move apart.
  10. 20. Point on Earth’s surface directly above an earthquake.
Down
  1. 2. Type of boundary where plates slide past each other.
  2. 3. Zone of frequent earthquakes/volcanoes around the Pacific.
  3. 4. Type of boundary where plates collide.
  4. 5. Supercontinent that existed 300 million years ago.
  5. 7. Thick layer between crust and core.
  6. 8. New ocean crust forms as plates pull apart.
  7. 11. Underwater mountain chain formed at divergent boundaries.
  8. 13. Molten rock beneath Earth’s surface.
  9. 16. Deep valley formed at a subduction zone.
  10. 18. Earth’s thin outermost layer.