Crossword about cold poles

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