Geography

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Across
  1. 1. large stream of water that flows across the land
  2. 4. land along sea or ocean
  3. 5. tidal mouth on a large river
  4. 7. highest kind of land
Down
  1. 2. low area of land between mountains
  2. 3. area of water and fertile land in a desert
  3. 5. dead
  4. 6. opening in the earth, usually raised, through which lava, rock, ashes and gases are forced out