Science crossword number three

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Across
  1. 3. a substance that flows freely but is of constant volume, having a consistency like that of water or oil
  2. 5. a technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.
Down
  1. 1. the action of purifying a liquid by a process of heating and cooling.
  2. 2. a substance made by mixing other substances together.
  3. 4. separation of a liquid mixture into fractions differing in boiling point.