Vocabulary Tic-Tac-Toe ( Crossword Square )

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Across
  1. 2. A method or device for detecting and locating objects especially underwater
  2. 4. Preserved remains or traces of remains of ancient organisms
  3. 5. Any long, narrow, steep-sided depression in the ocean bottom in which occur the maximum ocean depths
  4. 6. A flow of electrical charge, usually electrons or electron-deficient atoms
  5. 8. An elevated region with a central valley on an ocean floor
  6. 10. A map that indicates the features of the land's surface
  7. 13. The action in plate tectonics of the edge of one crustal plate descending below the edge of another
  8. 14. Tectonic plates spreading apart underwater
Down
  1. 1. Process by which heat is transferred by movement of a heated fluid like air or water
  2. 3. The hypothesis that continents were once a supercontinent
  3. 7. The name of the geologic supercontinent
  4. 9. A measure of the amount of matter in an object
  5. 11. The amount of space occupied by a substance
  6. 12. A substances mass per unit Volume