Geographical features

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Across
  1. 4. a large area covered with water
  2. 5. a large area of falt land with few trees
  3. 6. a hill of sand
  4. 7. an area of flat land wheree farmers grow crops
  5. 9. a hole in the side of a hill or under the ground
  6. 11. a river that falls from a high place
  7. 14. an area of land which is very high
Down
  1. 1. a hand-made inland area of water
  2. 2. an inland area of water
  3. 3. the low area of land between 2 mountains or hills which often has a river running through it
  4. 8. a large area of land with very little water and very few plants
  5. 10. a high area of rock next to the sea
  6. 12. a large area of land covered with trees
  7. 13. an area of land that is quite high