Element Crossword Puzzle

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Across
  1. 1. change inside of an organism
  2. 5. sharp, acid, oxygen
  3. 6. dealing with chemistry
  4. 8. iron
  5. 11. stable internal conditions
  6. 12. reaction to a stimulus
Down
  1. 2. smallest unit of an element
  2. 3. mass
  3. 4. script, write
  4. 7. change outside of an organism
  5. 9. same amount of reactants and products
  6. 10. mixture of multiple elements