changing states

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Across
  1. 3. anything that has mass and takes up space (volume)
  2. 5. (liquid to gas
  3. 6. when a gas turns into a solid
  4. 7. heating up liquid
Down
  1. 1. (gas to liquid)
  2. 2. turning a liquid into a solid
  3. 3. heating up a solid until itturns into a liquid
  4. 4. a substance changes directly from a solid to a gas