PLATE TECTONIC AND CONTINENTAL DRIFT

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Across
  1. 2. this is a large wave caused by earthquakes
  2. 7. plate tectonics helps in finding the age of ____ floors.
  3. 8. the thickest layer of the earth
  4. 9. Alfred Wegner believed that all the continents fitted together like....
  5. 14. the most important evidence that supports the plate tectonic theory.
  6. 16. the oceanic crust on the other hand is made up of _____ rock.
  7. 17. a slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles
  8. 18. where all the continents spread apart.
  9. 21. when two plate comes together
  10. 22. the biggest body of water available
  11. 24. the theory of plate tectonics identifies how many major types of lithospheric plates .
  12. 25. this happens when the earth crust buckles in a wavelike pattern, creating holls or mountain
  13. 28. evidence of dead plants and animal
  14. 29. how many plate boundaries are there
  15. 30. when tectonic plates slide past each other horizontally along strike-slipe faults or transform faults ____ boundaries are created.
  16. 34. device used to record an earthquake seismic wave
  17. 37. along diverging margin ______ are prevalent.
  18. 39. when two plate move apart
  19. 40. the theory of plate tectonics identifies how many minor types of lithospheric plates
Down
  1. 1. the most active example of continental convergent plate boundaries is the _____ mountain
  2. 3. the continental crust is made up of which rock.
  3. 4. a natural stream of water flowing in a channel to the sea, a lake or another such stream
  4. 5. he came up with the idea of continental drift
  5. 6. a large natural elevation of the earths surface rising abruptly from the surrounding level: a large steep hill
  6. 10. the upper layer of the earths mantle.
  7. 11. in the process of subduction on the oceanic plate is driven down into the
  8. 12. another word for lava
  9. 13. the term plate was first coined by
  10. 15. when the continents were all hooked together.
  11. 19. the mid Atlantic ridges are a good example of a ______ boundary.
  12. 20. the reason due to which earths plates are moving
  13. 23. the ______ plate is the only major plate that is completely oceanic.
  14. 26. the ridge outer part of the earth consisting of the crust and upper mantle
  15. 27. ______fit together like pizza puzzle
  16. 31. the innermost layer of the earth
  17. 32. outermost layer of a earth composed of ____ and brittle part of the upper mantle.
  18. 33. the lithosphere consist of only ______ crust
  19. 35. when one plate eventually slides beneath the other, the process is known as
  20. 36. something you drink to stay alive
  21. 38. the planet we live on