senicse tic tac toe

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Across
  1. 1. Process by which, in a fluid being heated, the warmer part of the mass will rise and the cooler portions will sink.
  2. 4. Tectonics A theory stating that the earth's surface is broken into plates that move.
  3. 7. A preserved remnant or impression of an organism that lived in the past.
  4. 8. The transfer of energy by electromagnetic waves
  5. 9. an area where plates move toward one another and collide
  6. 10. mass/volume
Down
  1. 2. the boundary between two plates that slide past each other
  2. 3. plates a rigid layer of the Earth's crust that is believed to drift slowly
  3. 5. A break in the earth's crust
  4. 6. a valley formed by the separation