water challenge

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Across
  1. 3. area the area of a liquid touching the air
  2. 4. to put objects in order by one property
  3. 5. happens when the temp is cold
  4. 6. steam is _______
  5. 7. why theres fog on your glass
Down
  1. 1. happens when temp is hot
  2. 2. water that is a gas