science crossword

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