Chapter 2 Notes: Plate Tectonics and the Structure of Ocean Basins

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Across
  1. 5. movement of continental masses on the surface of Earth.
  2. 7. The shallow, gently sloping section of the continental margin that extends from the shore to the point where the slope gets steeper.
  3. 9. gently sloping area at the base of the continental slope.
  4. 12. process involved in the movement of large plates on Earth’s crust.
  5. 13. semiliquid region between the crust and the core of Earth
  6. 15. downward movement of a plate into the mantle that occurs in trenches, which are also known as subduction zones.
  7. 16. A narrow, deep depression in the sea floor.
  8. 17. Loose material like sand and mud that settles on the bottom.
  9. 18. mass of a given volume of a substance
  10. 20. crack in Earth’s crust usually formed when pieces of crust move past each other.
  11. 21. a crack in Earth’s crust formed as pieces of the crust separate.
  12. 22. light-colored rock that forms most of the continental crust.
  13. 23. The outermost layer of Earth.
  14. 24. continuous chain of volcanic submarine mountains that extends around Earth.
  15. 25. nearly flat region of the deep-sea floor.
  16. 26. The natural environment where an organism lives.
Down
  1. 1. steeper, seaward section of the continental margin.
  2. 2. concept that is used to indicate that all oceans on Earth are interconnected
  3. 3. continental margin that is colliding with another plate and as a result is geologically active.
  4. 4. Regions of Earth’s lithosphere which move together over the asthenosphere. There are approximately 20 total plates.
  5. 6. process by which new sea floor is formed as it moves away from spreading centers in mid-ocean ridges.
  6. 7. edge of a continent; the zone between a continent and the deep-sea floor. Also see active and passive continental margins.
  7. 8. a cosmic explosion produced clouds of dust and gas from which Earth and the solar system originated.
  8. 10. section of the continental shelf where the slope abruptly becomes steeper, usually at a depth of 120 to 200 m.
  9. 11. The dark-colored rock that forms the sea floor, or oceanic crust.
  10. 14. the innermost layer of Earth.
  11. 17. A narrow, deep depression in the continental shelf formed by the erosion of rivers or glaciers before the shelf was submerged.
  12. 19. A deep-sea hot spring where heated seawater forces its way up through the crust.