Mountains

123456
Across
  1. 2. Summit of a mountain, highest point.
  2. 4. Peak, highest point of a mountain.
  3. 5. Steep rock face, often vertical.
  4. 6. Long, narrow hilltop or mountain crest.
Down
  1. 1. Large mass of ice on mountains.
  2. 3. Low land between mountains or hills.