Arctic Crossword Challenge

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Across
  1. 4. Earth’s frozen regions.
  2. 6. Large, slow-moving river of ice.
  3. 8. Whale jumping out of the water.
  4. 10. Preserved remains of ancient life.
  5. 11. Pile of snow shaped by the wind.
  6. 12. A massive chunk of floating ice.
  7. 13. Right side of a ship.
  8. 15. Natural home of a plant or animal.
  9. 16. Limb adapted for swimming.
  10. 17. Treeless, cold Arctic plain.
  11. 18. Long, protruding tooth in certain mammals.
Down
  1. 1. Ice breaking off a glacier into the sea.
  2. 2. Permanently frozen ground.
  3. 3. Seasonal movement of animals.
  4. 5. Guiding a vessel from place to place.
  5. 7. Long, narrow inlet carved by glaciers.
  6. 9. Arctic whale with a long, spiral tusk.
  7. 11. Flippered marine mammal is often found on ice.
  8. 14. A large marine mammal with tusks.