Elements of landscape

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Across
  1. 2. a small narrow river.
  2. 4. an area which is lower than the parts surrounding it.
  3. 6. a large flat area of land with very few trees on it.
  4. 7. a very high area of land with steep sides.
  5. 8. range a series of adjoining mountains or of lines of mountains of similar origin.
  6. 9. a large area of fresh water, surrounded by land.
Down
  1. 1. a low stretch of land between hills, especially one that has a river flowing through it.
  2. 3. an area of land that is higher than the land that surrounds it.
  3. 4. an area of low, flat land shaped like a triangle, where a river splits and spreads out into several branches before entering the sea.
  4. 5. a long narrow piece of land which sticks out from a larger piece of land and is almost completely surrounded by water.