Tectonic Plates Vocabulary

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Across
  1. 1. The place below ground where an earthquake starts.
  2. 3. plate, Section of Earth’s crust that moves about on Earth’s surface.
  3. 5. current, The movement of rock and magma in the mantle that transfers heat to the Earth's surface.
  4. 9. 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.
  5. 10. A layer of ‘plastic’ semi‐solid rock in the lower mantle on which Earth’s tectonic plates move.
  6. 11. wave, A seismic wave that travels along the surface of the Earth in the crust.
  7. 12. wave, The shaking wave-like movement of the ground in an earthquake.
  8. 14. The center of the Earth.
  9. 16. boundary, Plate boundary where lithosphere is destroyed.
  10. 19. A depression in the ocean floor.
  11. 20. boundary, Where plates are sliding parallel to each other but in opposite directions.
  12. 22. A huge wave in the ocean caused by an earthquake occurring on the seafloor.
  13. 24. Name for the crust and the upper mantle together; Earth’s tectonic plates.
  14. 25. Molten rock below Earth’s surface.
  15. 27. wave (S-wave), A transverse seismic wave that travels through Earth.
  16. 29. striping, Patterns of magnetism trapped in rocks on each side of plate boundaries.
  17. 30. A zone where Earth’s crust and mantle are being pulled apart.
Down
  1. 2. When one plate sinks below another plate during a collision.
  2. 4. boundary, Plate boundary where new crust is formed.
  3. 6. boundary, Where plates are moving apart from each other in opposite directions.
  4. 7. spreading, The process of new crust forming at the ocean ridges and spreading outwards.
  5. 8. boundary, The coming together of continents by drifting across the Earth’s surface.
  6. 9. The point on Earth’s surface directly above the focus of an earthquake.
  7. 13. An instrument that detects the seismic waves from an earthquake.
  8. 15. A place where extremely hot material from inside Earth erupts at the surface.
  9. 17. Earth’s outermost solid layer.
  10. 18. crust, The crust that forms the ocean floor.
  11. 21. spot, An isolated place away from plate boundaries where a lot of hot magma is collecting.
  12. 23. arc, A chain of islands formed at the edges of colliding tectonic plates where one plate subducts.
  13. 24. Molten rock that has erupted onto Earth’s surface.
  14. 26. Layer beneath Earth’s crust.
  15. 28. trench, A deep channel in the ocean floor where crust is sinking downwards.