Plate Tectonics

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Across
  1. 2. Melted rock that erupts onto the surface.
  2. 5. The Earth’s outermost solid layer.
  3. 7. Boundary where plates slide past each other.
  4. 9. The ancient “supercontinent” that broke apart.
  5. 10. Relating to structure and movement of Earth’s crust.
  6. 12. A crack in the crust where movement occurs.
  7. 13. The thick layer of hot rock beneath the crust.
  8. 15. Deep valley in the ocean floor formed by subduction.
  9. 16. Boundary where two plates move apart.
  10. 18. ridge Underwater mountain chain formed by diverging plates.
  11. 19. The Earth’s center, made mostly of iron and nickel.
Down
  1. 1. Melted rock found beneath Earth’s surface.
  2. 3. The soft, flowing layer beneath the lithosphere.
  3. 4. When one plate sinks beneath another.
  4. 6. Sudden shaking of the ground from plate movement.
  5. 8. A large ocean wave caused by an underwater earthquake.
  6. 9. A large section of Earth’s crust that moves.
  7. 11. Boundary where two plates collide.
  8. 14. The rigid outer part of the Earth (crust + upper mantle).
  9. 17. A mountain where lava, ash, and gas erupt.