matter

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Across
  1. 2. the smell of perfume gradually spreads across a room due to
  2. 3. what property or properties of gases can you point to support the assumption that most of the volume in gas is empty space?
  3. 5. energy gas molecules at higher temperatures have more _______ than at cooler temperatures
  4. 7. is the change of gaseous state directly to solid state without going through liquid state, and vice-versa.
Down
  1. 1. Dry ice is
  2. 4. What produces more severe burns, boiling water or steam
  3. 6. Rapid evaporation depends on the ______ area exposed to atmosphere