woah science!!!!

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Across
  1. 4. a process where 2 liquids and 2 gasses mix
  2. 9. easy to break or shatter
  3. 11. shiny
  4. 14. building blocks of matter
  5. 15. describes a form of matter that can mix
  6. 16. a change to gas to solid
  7. 19. grid-like structures
  8. 20. an alloy of copper and tin
  9. 21. substances formed from chemical reactions
Down
  1. 1. decrease in size
  2. 2. describes a form of matter that cannot mix
  3. 3. the first chemical explosive made in Ancient China
  4. 5. going to solid to gas
  5. 6. any combinations of elements/compounds
  6. 7. a form of sugar produced in photosynthesis
  7. 8. a substance made of long chains of smaller units
  8. 10. increase in size
  9. 12. the substances used in chemical reactions
  10. 13. a substance that cna chemically dissolve
  11. 17. minerals rich in metals
  12. 18. mixture of a metal with fellow metals or non-metals