Polar Bear

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Across
  1. 2. A very cold place at the top of the earth
  2. 4. Covered with something soft
  3. 6. A unit of weight
  4. 7. Little flakes of frozen water that fall from the sky
Down
  1. 1. Sliding instead of gripping
  2. 3. Something that you can see through
  3. 5. Empty on the inside