Earth/Environmental crossword puzzle

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Across
  1. 1. The amount of volume in an object
  2. 4. Occurs at divergent boundaries
  3. 5. Occurs along divergent plate boundaries (underwater)
  4. 6. Two plates coming together
  5. 8. Magma rising from the mantle
  6. 9. is where Earth's tectonic plates dive back into the mantle
Down
  1. 2. caused by a transform boundary
  2. 3. Two plates going apart
  3. 5. Lava that's underground
  4. 7. Two plates sliding past each other