Plate Tectonics

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Across
  1. 1. The only liquid layer of the Earth
  2. 5. A hypothesis that states the continents once formed a single landmass
  3. 10. Properties that involve a reaction to an applied load
  4. 13. Strong, lower part of the mantle
  5. 16. The theory that explains how plate tectonics move and change shape
  6. 18. Tectonic plates move apart from each other
  7. 19. Tectonic plates collide together
  8. 20. The thin, solid, rigid outermost layer of the Earth
Down
  1. 2. Something's ingredients or constituents
  2. 3. Soft plastic-like layer of the mantle
  3. 4. Solid outer layer of the outermost part of the Earth
  4. 6. Innermost layer of the Earth
  5. 7. The sinking of the regions of the Earth's crust
  6. 8. The middle layer of the Earth
  7. 9. The process by which new oceanic lithosphere forms
  8. 11. Tectonic plates slide past each other
  9. 12. A piece of lithosphere that floats on the asthenosphere
  10. 14. Stress that occurs when the forces act to squeeze an object
  11. 15. A break in a body of rock
  12. 17. The center of the Earth