PlateTectonics Cross Word Puzzle

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Across
  1. 2. relating to ocean depths from 2000 to 5000 meters
  2. 3. atom with the same atomic number, different numbers of neutrons
  3. 6. a specialist in the history of the earths recorded in rocks
  4. 7. a large continuous extent of land
  5. 10. relating to or occurring living in or frequenting the ocean
  6. 14. a flat mass of ice drifting at sea
  7. 16. a geologist who uses physical principles to study the properties of the earth
  8. 17. movement of the edge of one tectonic plate under another
  9. 18. rigid layer of the earth's crust that is believed to drift slowly
  10. 20. the organs in a body, collectively
Down
  1. 1. the movement or study of the movement of earth's crust
  2. 4. the chemistry if the earth's crust
  3. 5. the part of a rock formation that appears above the surface
  4. 8. the bottom of a sea or ocean
  5. 9. undergo condensation
  6. 11. of or relating to or characteristic of the crust of the earth or moon
  7. 12. use again after processing
  8. 13. molten rock in the earth's crust
  9. 15. the branch of geology studying the folding and faulting of the earth's crust
  10. 19. the largest unit of geological time