Plate Tectonics

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Across
  1. 2. __________ currents cause plates to move
  2. 4. where plates slide next to each other
  3. 7. where plates move away from each other
  4. 9. where plates collide
Down
  1. 1. Henry Hess' theory
  2. 3. Alfred Wegener's theory
  3. 5. famous fault like in California
  4. 6. convergent plates form these
  5. 8. when denser plates go under less dense plates