Living on ice

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Across
  1. 4. not staying in one place permanently, wandering around
  2. 6. clever, original, and inventive.
  3. 7. deep crack, or fracture, found in an ice sheet or glacier.
  4. 9. easily evaporated at normal temperature.
Down
  1. 1. lack of imaginative.
  2. 2. extremely great in number.
  3. 3. separated/quarantined
  4. 5. very big
  5. 8. occurs when one of the Earth's poles has its maximum tilt toward the Sun.