We've got CHEMISTRY

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Across
  1. 3. liquid to gas
  2. 5. solid to gas
  3. 6. number of protons in the nucleus
  4. 7. absorbs heat
  5. 11. gas to solid
  6. 14. a mixture that is not uniform
  7. 15. when two liquids do not mix
  8. 16. pressure is constant
  9. 17. atoms with different numbers of neutrons
  10. 18. microscopic particles are dispersed evenly
  11. 19. point at the end of a curve
Down
  1. 1. the process of burning something
  2. 2. gas to liquid
  3. 4. sum of protons and neutrons
  4. 5. numbers being accuracy
  5. 8. a combination of two substances
  6. 9. temperature is constant
  7. 10. volume is constant
  8. 12. releases heat
  9. 13. a mixture containing particles that settle out