Plate Tectonic Crossword

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Across
  1. 6. supercontinent containing all of the existing continents
  2. 8. account for 94% of earths surface area
  3. 10. a well-tested theory proposing that earths outer shell consists of individual plates that interact in various ways
  4. 13. a boundary in which two plates move together
  5. 14. produce tensional forces that pull and stretch the lithosphere
  6. 15. a continuous elevated zone on the floor of all the major ocean basins and varying in width from 500 to 5000km
  7. 17. A hypothesis, first proposed by Harry Hess
  8. 19. is the primary driving force for movement of tectonic plates
Down
  1. 1. a boundary in which two plates move apart
  2. 2. two oceanic slabs converge
  3. 3. Coastlines, Matching fossils, geologic features, ancient climates
  4. 4. heat is continuously flowing outward from earths interior
  5. 5. a chain of volcanic islands generally located a few hundred km from a trench
  6. 7. a hypothesis which suggested that all present continents once existed as a single supercontinent
  7. 9. processes that deform earth’s crust
  8. 11. elevated areas of the seafloor characterized by high heat flow and volcanism
  9. 12. a boundary in which two plates slide past one another without creating or destroying lithosphere
  10. 16. a narrow, elongated depression of the seafloor
  11. 18. Has a greater density than continental crust