States of Matter

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Across
  1. 5. Changing from liquid to vapor without reaching its boiling point
  2. 7. Change of one substance into another
  3. 10. Changing from solid directly to vapor without forming a liquid
  4. 13. Any change that causes a liquid or solid to become a gas
  5. 14. Change from solid to liquid by adding heat energy
  6. 15. Characteristic of material that can be changed without changing its identity
  7. 16. Anything that has mass and takes up space
Down
  1. 1. Changing from a vapor or gas to a liquid
  2. 2. A neutral particle that forms from atoms sharing electrons
  3. 3. Changing from a liquid to a solid by taking away heat
  4. 4. Changing to vapor by adding heat
  5. 6. Changing directly from a gas to a solid without forming a liquid
  6. 7. An observable characteristic of a substance that produces a new substance
  7. 8. The degree to which one substance will react with another
  8. 9. Any change of a substance that doesn't change its identity
  9. 11. Smallest particle of an element that retains properties of that element
  10. 12. Mass per unit volume of material