Plate Tectonics

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Across
  1. 5. a tectonic boundary where two plates are moving toward each other
  2. 9. a thing that breaks the crust of the earth
  3. 10. when two plates move away from each other
Down
  1. 1. gigantic pieces of earth's crust and the upper mantle
  2. 2. something that puts cracks in the earth and creates earthquakes
  3. 3. a real or imaginary line dividing two things
  4. 4. when two tectonic plates move past each other
  5. 6. made when one tectonic plates slides under on another
  6. 7. made when two continental plates collide and crumble and fold
  7. 8. the only planet that holds life forms.