chapter 7 vocab

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