Science Crossword Puzzle

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Across
  1. 3. Best Class Section
  2. 5. 9x10
  3. 8. ___________ boundary makes trenches
  4. 9. ___________ current
  5. 10. Acid rain is ________ weathering
  6. 12. Moving away of rocks
Down
  1. 1. Least dense layer
  2. 2. ________ zone
  3. 3. Density of a cube with a mass of 52 and a volume of 4
  4. 4. Atomic Number of Potassium
  5. 6. Bobby is #___!
  6. 7. Supercontinent
  7. 11. 101 is _______!