Plate Tectonics

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Across
  1. 3. Ocean floor sinks beneath a trench and into the mantle
  2. 8. A large chunk of the lithosphere
  3. 11. Vibrate side to side and up and down. Second to arrive (aftershock)
  4. 15. Evidence of continental drift where some continents that were near the poles had fossils of tropical animals
  5. 16. Slow moving, cool, high viscosity lava
  6. 19. A weak spot in the crust where magma reaches Earth’s surface
  7. 20. A scale that measures the magnitude of an earthquake
  8. 25. Bowl shaped area that forms at the top of a volcano
  9. 29. The underwater ridge in between two tectonic plates
  10. 30. A measure of the effects of an earthquake
  11. 32. Compress and expand. First to arrive
  12. 36. Plates slip past each other in opposite directions
  13. 37. The measure of the strength of the earthquake
  14. 38. Evidence from continental drift where SImilar fossils are found in separated lands
  15. 39. The area under the earth where rock breaks
  16. 40. Fast moving, hot, low viscosity lava
Down
  1. 1. Large pieces of rock that come flying down to earth after an explosive eruption
  2. 2. The name of the single landmass proposed by the theory of continental drift
  3. 4. The hanging wall slides down the footwall
  4. 5. A combination. Alternating slow lava flow and explosive eruptions
  5. 6. The measurement of the resistance to flow
  6. 7. The shaking and trembling that results from the movement of rock beneath Earth’s surface
  7. 9. The theory that all continents were once joined together in a single landmass
  8. 10. The major force responsible for tectonic plate movement
  9. 12. The area on the surface above the focus
  10. 13. Rocks on either side slip past each other
  11. 14. Tectonic plates move away from each other due to new molten rock being formed
  12. 17. Repeated explosive eruptions form steep, cone shaped hill
  13. 18. The pocket under the volcano where the magma collects
  14. 21. Proposed the theory of continental drift
  15. 22. A major volcanic belt formed around the edge of the Pacific Ocean
  16. 23. Plates move apart
  17. 24. The location where two plates interact
  18. 26. A large wave caused by underwater earthquakes displacing water
  19. 27. Lava flows gradually and forms a wide, gently sloping mountain
  20. 28. The hanging wall slides up the footwall
  21. 31. Plates collide
  22. 33. An area where material deep from the mantle rises and breaks through the crust
  23. 34. Evidence for continental drift that shows land features lining up across oceans
  24. 35. A scale that measures the intensity of an Earthquake