Plate Tectonics and The Structure of Ocean Basins

Edit Answers
1234567891011121314151617181920212223242526272829303132333435363738394041
Across
  1. 3. A deep-sea hot spring where heated seawater forces its way up through the crust.
  2. 7. A continental margin that is located at the “trailing edge” of a continent and as a result shows little geological activity.
  3. 9. The natural environment where an organism lives.
  4. 11. The innermost layer of Earth.
  5. 15. The downward movement of a plate into the mantle that occurs in trenches
  6. 19. The light-colored rock that forms most of the continental crust.
  7. 20. The continuous chain of volcanic submarine mountains that extends around Earth.
  8. 22. A flat-topped seamount.
  9. 24. The section of the continental shelf where the slope abruptly becomes steeper, usually at a depth of 120 to 200 m.
  10. 28. The steeper, seaward section of the continental margin.
  11. 30. A type of biogenous sediment that is made of the calcium carbonate shells and skeletons of marine organisms.
  12. 31. The semiliquid region between the crust and the core of Earth.
  13. 32. Loose material like sand and mud that settles on the bottom.
  14. 33. A concept that is used to indicate that all oceans on Earth are interconnected.
  15. 34. A continental margin that is colliding with another plate and as a result is geologically active.
  16. 36. The edge of a continent; the zone between a continent and the deep-sea floor.
  17. 38. The boundary between two plates that move past each other on Earth’s surface.
  18. 39. A microscopic shell or other remains that make up biogenous sediments.
  19. 40. A narrow, deep depression in the sea floor.
  20. 41. Region of Earth’s lithosphere which move together over the asthenosphere.
Down
  1. 1. Topographic features of the deep-ocean floor.
  2. 2. The process involved in the movement of large pieces of Earth’s crust.
  3. 4. The movement of continental masses on the surface of Earth.
  4. 5. A crack in Earth’s crust usually formed when pieces of crust move past each other.
  5. 6. phenomenon in the sea floor that run parallel to the mid-ocean ridge.
  6. 8. The physical and chemical breakdown of rocks.
  7. 10. The shallow, gently sloping section of the continental margin that extends from the shore to the point where the slope gets steeper.
  8. 12. Sediment that is made up of the skeletons and shells of marine organisms.
  9. 13. The mass of a given volume of a substance.
  10. 14. The dark-colored rock that forms the sea floor, or oceanic crust.
  11. 16. A crack in Earth’s crust formed as pieces of the crust separate.
  12. 17. The process by which new sea floor is formed as it moves away from the centers in mid-ocean ridges.
  13. 18. Sediment that is derived from the weathering of rocks.
  14. 21. The outermost layer of Earth.
  15. 23. A microscopic shell or other remains that make up biogenous sediments.
  16. 25. The gently sloping area at the base of the continental slope.
  17. 26. The theory that a cosmic explosion produced clouds of dust and gas from which Earth and the solar system originated.
  18. 27. A depression in the midocean ridge.
  19. 29. A procedure used to determine the age of recent fossils.
  20. 35. The nearly flat region of the deep-sea floor.
  21. 37. A submarine volcano in the abyssal plain.