Life on Ice

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Across
  1. 1. one thickness
  2. 4. a large chunk of ice floating in water
  3. 7. always the same
  4. 8. rock from outerspace
  5. 9. home of the North Pole
  6. 10. heated beyond a safe point
Down
  1. 2. home of the South Pole
  2. 3. without warning
  3. 5. weather conditions over many years
  4. 6. the measure of hot or cold