plate tectonics

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Across
  1. 3. this boundaries plates slide past each other
  2. 7. meant to move away
  3. 8. means to move towards and meet
  4. 9. is molten rock
  5. 10. valleys occur at divergent boundaries
Down
  1. 1. curves away and never meets
  2. 2. a light low density rock that forms the ____ crust
  3. 4. a dividing line
  4. 5. causes tectonic plates to move they are called convection currents
  5. 6. the mass of a substance per unit volume