A worldly place

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Across
  1. 3. A valley between two plateaus of more
  2. 4. A high piece of land
  3. 6. A sandy place near the sea or ocean
  4. 7. A dry place without much water or vegetation
  5. 9. This is one of the five bodies of water
  6. 10. This is a high flat land
  7. 12. This is water falling from a high ground
Down
  1. 1. A piece of land surrounded by water
  2. 2. This is a place filled with people
  3. 3. This is the difference between two things
  4. 5. A huge pond of water
  5. 8. These are different types of living things
  6. 11. this is the shape of a land