Plate tectonics vocabulary.

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Across
  1. 3. The bending of rock layers due to stress.
  2. 6. The strong, lower part of the mantle between the Asthenosphere and the outer core.
  3. 8. Plate A block of lithosphere that consists of the crust and the rigid, outermost part of the mantle.
  4. 10. Tectonics The theory that explains how the tectonic plates move and change shape.
  5. 12. Boundary The boundary between two tectonic plates that are moving away from each other.
  6. 13. Drift The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.
  7. 16. The thin and solid outermost layer of the Earth, above the mantle.
  8. 17. The solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle.
  9. 18. The layer of rock between the Earth’s crust and core.
Down
  1. 1. Boundary The boundary between tectonic plates that are sliding past each other horizontally.
  2. 2. Boundary The boundary formed by the collision of two lithospheric plates.
  3. 4. The stress that occurs when forces act to squeeze an object.
  4. 5. The rising of regions of the Earth’s crust to higher elevations.
  5. 7. Stress that occurs when forces act to stretch and object.
  6. 9. The central part of the Earth below the mantle.
  7. 11. The soft layer of the mantle on which the tectonic plates move.
  8. 14. Spreading The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.
  9. 15. A break in a body of rock along which one block slides relative to another.