Plate Tectonics and Continental Drift Crossword Puzzel

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Across
  1. 4. where Earth's tectonic plates dive back into the mantle
  2. 8. an area on Earth where two or more lithospheric plates collide.
  3. 9. A sudden and violent shaking of the ground
  4. 12. the assembly of most or all of Earth's continental blocks or cratons to form a single large landmass
  5. 15. a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
  6. 16. several large landmasses
  7. 17. remembered as the originator of the continental drift hypothesis
  8. 19. long narrow depressions on the seafloor
Down
  1. 1. A line that marks the limits of an area
  2. 2. formed by the effects of folding on layers within the upper part of the Earth's crust
  3. 3. a linear shaped lowland between several highlands or mountain ranges
  4. 5. the blocks of continental fragments and oceanic islands that have collided with a continent
  5. 6. A theory explaining the structure of the earth's crust
  6. 7. a theory that explained how continents shift position on Earth's surface
  7. 10. a proposed explanation made on the basis of limited evidence
  8. 11. a system of ideas intended to explain something
  9. 13. a chain of volcanoes formed above a subducting plate
  10. 14. a fracture or zone of fractures between two blocks of rock
  11. 18. a linear feature that exists between two tectonic plates that are moving away from each other