Natural Formations

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Across
  1. 3. Low areas of land between mountains or hills
  2. 4. Slowly moving mass or river of ice
  3. 5. U-shaped lake
  4. 10. Land surrounded by water on all sides
  5. 11. Land surrounded by water on 3 sides
  6. 12. Vast areas of flat open land
Down
  1. 1. Large area of water surrounded by land
  2. 2. Mountain with a crater through which lava flows
  3. 6. Sections of a river where water drops over a steep, rocky ledge
  4. 7. Deep valley with very steep sides, often has a river flowing through it
  5. 8. Group of islands
  6. 9. Small mound of land smaller than a mountain