Sibs Hibernation

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Across
  1. 3. a hanging piece of ice
  2. 5. a common pure white sled dog
  3. 7. small animal with quills
  4. 9. a tree that stays green even in winter
Down
  1. 1. a natural phenomenon with sixfold symmetry
  2. 2. a long heavy snowstorm
  3. 4. yellow autobot in transformer
  4. 6. hiss hiss
  5. 7. a condition where animals go to sleep during winter
  6. 8. a human figure made of snow