Tectonic Plates

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Across
  1. 2. spreading theory that magna forms below and is forced upwards to the surface
  2. 5. Liquid layer made mostly of Iron
  3. 8. hypothesis of Alfred Wegener about the continents positions
  4. 10. a break in a body of rock along which one block slides relative to another
  5. 11. opening on Earth's surface where volcanic material passes
  6. 13. rigid, outermost layer
  7. 15. semicircular depression that forms and sinks
  8. 16. Earths outermost layer
  9. 19. a boundary where the plates of the earth's crust collide
  10. 20. a landmass that's exists when continents are joined together
Down
  1. 1. lower part of the mantle
  2. 2. the process of moving the lithosphere down into the mantle
  3. 3. the bending of rocks due to stress
  4. 4. dense, solid center
  5. 6. place where the plates of the Earth's crust move past one another
  6. 7. slabs that make up the Earth's crust and upper mantle
  7. 9. soft layer of the mantle
  8. 12. fissure in the Earth's surface
  9. 14. shaking of the Earth's surface
  10. 17. largest layer of the Earth
  11. 18. boundary where the earth's plates move away from one another