science crossword

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Across
  1. 2. a basin-like depression because a volcano has exploded or the center of the volcano has collapsed
  2. 4. of fire, an area where many earthquakes and volcanoes occur
  3. 6. horizontal intrusions
  4. 7. chamber, large underground pool of molten rock
  5. 9. currents, what causes the plates to move
  6. 11. named after the Laurentian shield in Canada
  7. 13. waves, waves caused by earthquakes and rock movement
  8. 15. cone, lava that is built up in the shape of a cone
  9. 17. a fracture or zone or fractures between two blocks of rock
  10. 18. core, solid ball of nickel and iron densest layer of the earth
Down
  1. 1. circular basin or depression
  2. 2. rocks move together
  3. 3. vertical intrusion
  4. 5. first waves to reach the seismic station
  5. 8. named for the Gondwana region in India
  6. 10. zone, where one tectonic plate moves under another tectonic plate
  7. 12. Hess, proposed the plate tectonics theory
  8. 14. next waves to reach the seismic station
  9. 15. rocks slide past each other
  10. 16. Wegner, proposed the continental drift theory