Chemistry

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Across
  1. 2. light needed for photosynthesis to take place
  2. 4. state of matter without fixed volume and particles moving at random speeds in random directions
  3. 6. cannot be separated into simpler substance by chemical means
  4. 9. state of matter where particles are packed tightly and can vibrate
  5. 10. metal used to wire homes
  6. 12. the smallest unit of a chemical element
  7. 14. element that conducts heat and electricity poorly
  8. 16. reactant in photosynthesis
  9. 18. state of matter with a definite volume and particles can flow
  10. 19. substance with only one type of particle
Down
  1. 1. chemical reaction that happens in all living cells
  2. 3. needed for photosynthesis to take place
  3. 5. state of matter of the sun
  4. 7. the smallest naturally occurring particle of a substance. It may contain one type of atom (oxygen) or many thousands of atoms (protein).
  5. 8. product of respiration
  6. 11. substance made up two or more different elements chemically bonded together
  7. 13. element that is shiny and conducts heat and electricity
  8. 15. substances together but not chemically combined
  9. 17. metal used to make rings