LAND AND WATER

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Across
  1. 3. Elevated land higher than a hill...
  2. 4. Expanse of relatively level treeless country...
  3. 6. Inland body of water...
  4. 8. Body of water smaller than a gulf...
  5. 9. Extension of an ocean or a sea into the land...
Down
  1. 1. Deep valley with steep sides...
  2. 2. Opening in the Earth's crust from which rock and steam come out...
  3. 4. Large level area of high land...
  4. 5. Land surrounded by water...
  5. 7. Body of water smaller than a gulf...