P6

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Across
  1. 5. keep warm
  2. 6. smooth
  3. 7. air
  4. 9. hardness/di
  5. 10. hiking
Down
  1. 1. equipment
  2. 2. maybe
  3. 3. choose
  4. 4. oxygen
  5. 6. mountains
  6. 8. need