Plate Tectonics Crossword

123456789101112131415161718
Across
  1. 2. a place where extremely hot material from inside Earth erupts at the surface
  2. 4. molten rock that has erupted onto Earth's surface
  3. 5. older crust is pushed below new ocean crust and squeezes the plates sideways
  4. 6. name for the crust and the upper mantle together; Earth's tectonic plates
  5. 7. when one plate sinks below another plate during a collision
  6. 10. a longitudinal seismic wave that travels fast through Earth
  7. 13. a huge wave in the ocean caused by an earthquake occurring on the seafloor
  8. 16. a layer of 'plastic' semi-solid rock in the lower mantle on which Earth's tectonic plates move
  9. 17. the place below ground where an earthquake starts
  10. 18. a depression in the ocean floor
Down
  1. 1. molten rock below Earth's surface
  2. 3. the crust that forms the ocean floor
  3. 7. plates are pulled apart at the mid-ocean ridges
  4. 8. the point on Earth's surface directly above the focus of an earthquake
  5. 9. layer beneath Earth's crust
  6. 11. the process of continents breaking up, subsiding and allowing in water from the sea
  7. 12. the rapid movement of the ground, usually back and forth and up and down in a wave motion, due to the movement of tectonic plates
  8. 14. isolated place away from plate boundaries where a lot of hot magma is collected
  9. 15. a chain of islands formed at the edges of colliding tectonic plates where one plate subducts