Plate Tectonics and Continental Drift Crossword Puzzel

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