Plate Tectonics

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Across
  1. 4. Solid outer layer that consists of the crust.
  2. 5. The center of the Earth and is mostly made up of iron and nickel.
  3. 7. zone The sinking of regions.
  4. 11. core The inner most layer of our planet
  5. 12. Plate A block of lithosphere that consists of the crust.
  6. 13. The soft plastic layer.
  7. 14. The thinnest layer on Earth.
  8. 15. Spreading The process by which thee new oceanic lithosphere forms.
  9. 16. A break in the Earth's crust.
  10. 18. Stress that occurs when the forces act to squeeze.
  11. 20. Drift The thinking that states that the continents moved once.
Down
  1. 1. The nature of something's ingredient or constituents.
  2. 2. Properties Properties that involve a reaction.
  3. 3. Boundary Where Tectonic Plates slide past each other.
  4. 6. core The only liquid layer of the planet.
  5. 8. Boundary Where Tectonic Plates drift apart.
  6. 9. The strong lower part of the mantle.
  7. 10. Tectonic Theory The theory that explains how large pieces of the Earth's crust move.
  8. 17. Boundary Where Tectonic Plates collide.
  9. 19. The biggest layer and the middle layer of the Earth.