Crossword Puzzle

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Across
  1. 2. splitting unstable particles
  2. 4. the age where people use reasons and science
  3. 6. 9.8 m/s2
  4. 7. build up of substance in a body
  5. 8. the result of excess nutrients in the water
  6. 9. upthrust
  7. 10. inside a system
Down
  1. 1. sinθ cosθ tanθ
  2. 3. ΔU = Q - W
  3. 5. maximum population size