Plate Tectonics Vocabulary

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Across
  1. 3. point of Earth's surface directly above an earthquake's focus
  2. 5. a pulling force
  3. 9. core liquid layer of the Earth's core
  4. 10. powerful seismic sea wave that can travel thousands of kilometers in all directions and that begins over an earthquake focus
  5. 13. boundary between two plates that are sliding past each other
  6. 14. outermost rigid layer of the Earth
  7. 17. opening in Earth's surface that often forms a mountain when layers of lava and volcanic ash erupt and build up
  8. 19. soft layer of the mantle
  9. 20. outermost layer of the Earth
  10. 21. the bending of rock layers
Down
  1. 1. a break in the Earth's crust
  2. 2. single large landmass made up of all the continents connected together that broke apart 200 million years ago
  3. 4. boundary between two colliding plates
  4. 6. boundary between two plates moving away from each other
  5. 7. a region where an oceanic plate sinks down into the athenosphere
  6. 8. theory that continents drift apart
  7. 11. vibrations caused by breaking rocks along faults
  8. 12. layer between the crust and the core
  9. 15. core solid, dense center of the Earth
  10. 16. in an earthquake, the point beneath Earth's surface where energy release occurs
  11. 18. a squeezing force