state of matter

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Across
  1. 1. consists of only one substance without any contaminating
  2. 5. Ethanol with a boiling point at 78 C, is more .... than water
  3. 7. the process is reversed at precisely the same temperature if a liquid is cooled down
Down
  1. 2. the reverse of evaporation is ....
  2. 3. the temperature at which a substance turns to a liquid
  3. 4. when liquid change in to gases in this way, the process is called ....
  4. 6. bubbles of gas appear inside the liquid. the process is known as ....