Matter

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Across
  1. 2. neither gaseous nor liquid
  2. 5. having the form of or being gas
  3. 9. the degree of hotness or coldness of something (as air, water, or the body) as shown by a thermometer
Down
  1. 1. the substance of which a physical object is composed
  2. 3. neither solid nor gaseous
  3. 4. when fine particles of water are floating in the atmosphere near the ground
  4. 6. the invisible vapor into which water is changed when heated to the boiling point
  5. 7. the gas of burning materials (as coal, wood, or tobacco) made visible by small particles of carbon floating in it
  6. 8. a fluid (as hydrogen or air) that has no fixed shape and tends to expand without limit