Science Crossword Puzzle

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Across
  1. 1. The floor of the sea or ocean
  2. 4. large-scale processes affecting the structure of the earth's crust.
  3. 5. Forming or belonging to a continent
  4. 8. Release of strain energy causing the ground to shake
Down
  1. 1. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  2. 2. animal remains
  3. 3. The central or most important part of something
  4. 5. form into a hard outer layer
  5. 6. A deep narrow hole or ditch in the ground
  6. 7. a long narrow hilltop, mountain range, or watershed.