Geographical features

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Across
  1. 4. Water surrounded by land
  2. 6. Large areas of salt water
  3. 7. A low area of land between mountains or hills
  4. 9. Very high hills
Down
  1. 1. A place at the top and bottom of the world
  2. 2. A place where water flows down
  3. 3. A very dry place covered by sand or rocks
  4. 5. A land that is covered by trees
  5. 8. Water that flows