Unit 3 - The Restless Earth

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Across
  1. 3. Earthquakes release waves of energy that travel through rock
  2. 6. Earth's thin, outer shell
  3. 8. Where two or more tectonic plates meet
  4. 9. The place within the Earth along a fault at which the first motion of an earthquake occurs
  5. 12. The hypothesis that today's continents were once part of a single landmass
  6. 14. The return of rock to its original shape after elastic deformation
  7. 17. Directly above the focus on Earth's surface
  8. 19. A change of the magnetic poles
  9. 21. The outermost physical layer of the Earth
  10. 22. Any movement that results from differences in density
  11. 23. A solid, thin layer of mantle material below the lithosphere
Down
  1. 1. The process by which new sea floor forms
  2. 2. When tectonic plates move towards each other and collide
  3. 4. Are ground movements that occur when blocks of rock in Earth move suddenly and release energy
  4. 5. The layer below the crust
  5. 7. The process by which one tectonic plate is pulled beneath another plate
  6. 10. When tectonic plates move away from one another or diverge
  7. 11. The center of the Earth, contains very dense elements
  8. 13. Scientists eventually modified continental drift into a theory called
  9. 15. When tectonic plates can move past one another in opposite directions
  10. 16. The bending, tilting, and breaking of rock
  11. 18. A break in Earth's crust along which blocks of rock move
  12. 20. The lower part of the mantle