vocabulary

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Across
  1. 1. vibrations caused by the rupture and sudden movement of rocks
  2. 7. crater a round depression formed on the surface of a planet, moon, or
  3. 8. ridge long, narrow mountain range on the ocean floor; formed by magma
  4. 10. with respect to each other.
  5. 11. magma that erupts onto Earth's surface.
  6. 12. tectonics theory that Earth’s surface is broken into large, rigid pieces that
  7. 15. plate at a convergent plate boundary.
  8. 17. a break or a crack in Earth’s crust.
  9. 19. drift Wegener’s hypothesis that all continents were once connected in a
  10. 21. molten rock stored below Earth's surface.
  11. 22. drifted slowly to their current positions.
  12. 23. the process that occurs when one tectonic plate moves under
  13. 26. a vent in Earth's crust through which molten rock flows.
  14. 28. space object by the impact of a meteorite.
  15. 29. a crack or a fracture in Earth’s lithosphere along which movement
  16. 31. rapid, downhill movement of soil, loose rocks, and boulders.
Down
  1. 2. and older oceanic crust moves away from the ridge.
  2. 3. boundary the boundary between two plates that move toward each other.
  3. 4. large landmass that broke apart about 200 million years ago
  4. 5. name given to a supercontinent that began to break apart
  5. 6. boundary the boundary between two plates that move away from each other.
  6. 9. spreading the process by which new oceanic crust forms along a mid-ocean
  7. 13. volume of water.
  8. 14. tectonic plate.
  9. 16. a wave that forms when an ocean disturbance suddenly moves a
  10. 18. trench a deep, underwater trough created by one plate subducting under
  11. 20. divergent plate boundaries.
  12. 22. 200 million years ago.
  13. 24. boundary the boundary between two plates that slide past each other.
  14. 25. zone an area of many fractured pieces of crust along a large fault.
  15. 27. the mechanical and chemical processes that change Earth’s surface
  16. 30. arc a curved line of volcanoes that forms parallel to a plate boundary.