ten words

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Across
  1. 3. the change of land do to plates under the earth crust
  2. 6. to apart
  3. 7. to move under another
  4. 9. to move apart
  5. 10. land form under the earth plates the constently move
Down
  1. 1. the upper layer of the earth's mantle
  2. 2. the slow movement of of large land masses
  3. 4. a constent line of volcanic and sizmic active
  4. 5. prints in rock or perseared bones form year ago
  5. 8. a valley like land form on the ocean floor