chapter 7 vocab

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