Chapter 4 vocabulary

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Across
  1. 3. crust Makes up the continental landmass
  2. 5. Theory that the lithosphere is made up of plates that float on the asthenosphere
  3. 6. Huge ocean surrounding Pangaea
  4. 7. Zone of mantle beneath the lithosphere that consists of slowly flowing solid rock
  5. 8. Movement of the ocean floor away from either side of a mid-ocean ridge
  6. 11. Undersea mountain range with a steep, narrow valley along its center
  7. 14. A region where one lithospheric plate moves under another
  8. 15. When the oceanic crust sinks under the continental crust
  9. 16. Piece of land with a geologic history
  10. 17. The continents connected to create one giant landmass
  11. 19. Two plates moving away from each other
  12. 20. crust Material on the ocean floor
  13. 21. Two plates grinding past each other
Down
  1. 1. The transfer of heat through the movement of heated material
  2. 2. Theory that continents are a patchwork of pieces of land that have individual geologic history
  3. 4. Chain of volcanic islands formed along an ocean trench
  4. 9. Hypothesis stating that the continents once formed a single landmass, broke up, and drifted to their present locations
  5. 10. Thin outer shell of the earth consisting of the crust and the rigid upper mantle
  6. 12. Steep, narrow valley formed as lithospheric plates separate
  7. 13. The direct collision of plates
  8. 18. of microplate tectonics Theory that continents are a patchwork of pieces of land that have individual geologic histories