Ryans Matter crossword puzzle

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Across
  1. 2. Two substances combining
  2. 5. An action taken in response of something
  3. 9. The characteristic observed during a chemical reaction
  4. 11. the study of matter
  5. 12. smallest unit of element
  6. 13. when two or more substances are combined
  7. 16. releases heat
  8. 17. two or more atoms bonded together
Down
  1. 1. two substances formed during a chemical reaction
  2. 2. mass+volume=
  3. 3. The ability to do work or cause change
  4. 4. Takes up space
  5. 6. the transfer of thermal energy
  6. 7. Molecules the same stick together
  7. 8. A __ property is characteristic that can be observed
  8. 10. absorbs heat
  9. 14. the amount of matter in a object
  10. 15. a pure substance that cant be broken