Crossword about cold poles

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Across
  1. 3. Arctic mammal
  2. 4. the area of the Earth surrounding the North Pole
  3. 7. builds an igloo
  4. 9. north and south on the globe
  5. 10. flightless bird
Down
  1. 1. Eskimo boat
  2. 2. weapon for catching large fish
  3. 5. snow house
  4. 6. on the river in winter
  5. 8. correct name of the Eskimo