Plate tectonics

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Across
  1. 3. what is one piece of evidence Alfred wegner had for the continental drift theory?
  2. 4. when 2 plates move toward each other
  3. 8. what causes seafloor spreading?
Down
  1. 1. heat transferred through liquid or gas
  2. 2. when 2 plates move away from each other
  3. 5. when 2 plates slide past each other
  4. 6. heat transferred through space
  5. 7. heat transferred through direct contact