mountains vocabulary

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Across
  1. 1. : The altitude above which snow remains year-round.
  2. 3. : An area of low land between mountains.
  3. 4. : The point above which trees do not grow.
  4. 8. : A flat, high area of land.
  5. 9. : The bottom of a mountain.
Down
  1. 1. : The highest point of a mountain.
  2. 2. : The side of a mountain.
  3. 5. : A long, narrow elevated section of land.
  4. 6. : An area of rising ground leading to a peak.
  5. 7. : A visible rock formation at the surface.