phase change

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Across
  1. 3. molecules in solids _______ in place instead of moving.
  2. 4. when a liquid turns to a gas
  3. 6. gas cooling into a liquid
  4. 10. unit of temperature that most of the world except the US and some use
  5. 12. average kinetic energy in a substance
  6. 13. force that pulls molecules together
  7. 15. state of matter with fixed volume but no fixed shape
  8. 16. the smallest unit of matter (until 8th grade science)
  9. 19. when liquid loses enough energy to lose the ability to flow
  10. 21. very fast transition from liquid to gas
  11. 22. slow change from liquid to gas; usually at the surface
  12. 23. state of matter where atoms have enough energy to tear themselves apart
  13. 24. process of combustion that emits light and heat
  14. 25. solid turning into a liquid
Down
  1. 1. when gas becomes a solid without a liquid phase
  2. 2. solid skipping liquid phase and turning into a gas
  3. 5. group of atoms bonded together
  4. 7. the flat part in a graph, usually while phase change
  5. 8. flowable substances: liquid and gas
  6. 9. flow of thermal energy; often a product of a chemical reaction
  7. 11. state of matter where molecules have the least energy
  8. 14. type of chemical reaction that causes a release of heat and light
  9. 17. when a chemical reaction results in the forming of a solid substance
  10. 18. when molecules reach a certain degree of K.E to affect their property
  11. 20. group of molecules with no limit to the size of density