Crossword Puzzle

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Across
  1. 3. The movement of tectonic plates
  2. 4. A tectonic plate boundary where plates collide
  3. 6. A volcanic island formed by underwater eruptions
  4. 8. The theory explaining the movement of the Earth's plates
  5. 10. The hot, semi-fluid rock in the Earth’s mantle
  6. 12. The scientific study of earthquakes
  7. 13. The boundary where two tectonic plates meet
Down
  1. 1. A boundary where two tectonic plates move apart
  2. 2. The scale used to measure the magnitude of earthquakes
  3. 5. The molten rock beneath the Earth’s surface
  4. 7. The layer of the Earth beneath the crust
  5. 9. A type of volcano that erupts explosively
  6. 11. Molten rock that erupts from a volcano