states of matter review

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Across
  1. 4. two or more different elements chemically combined
  2. 5. state of matter that has a fixed volume and fixed shape
  3. 7. subatomic particle with a positive charge
  4. 10. liquid changes to gas (without boiling)
  5. 12. state of matter that does not have a fixed shape or volume
  6. 13. the ability to cause changes in matter
  7. 14. solid changes directly to gas
  8. 18. consists of only one kind of atom
  9. 19. subatomic particle with a negative charge
  10. 20. subatomic particle with a neutral charge
  11. 21. liquid changes to solid
Down
  1. 1. energy is gained or added during a change of state
  2. 2. solid changes to liquid
  3. 3. gas changes to a liquid
  4. 5. different forms in which matter can exist without the chemical makeup of the matter changing
  5. 6. any substance which has mass and occupies space
  6. 8. state of matter that has a fixed volume but not a fixed shape
  7. 9. the amount of matter in an object
  8. 11. gas changes directly to a solid
  9. 15. two or more of the same atom combined
  10. 16. adding or removing __________ can change states of matter.
  11. 17. the amount of mass per unit volume of an object
  12. 19. energy is lost or removed during a change of state