Geography Vocabulary

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Across
  1. 4. spreading Harry Hess discovered what
  2. 6. the hottest layer on earth
  3. 7. move away from each other
  4. 9. drift Alfred Wegner discovered what
Down
  1. 1. places where plates slide sideways
  2. 2. the thinnest layer on the earth
  3. 3. two or more lithospheric plates collide
  4. 5. occurs as tectonic plates are pushed together
  5. 8. a fracture or a crack between
  6. 10. plates are gigantic pieces of the Earth's crust