Water in the world

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Across
  1. 1. biggest ocean in the world
  2. 5. longest river in Australia
  3. 7. water is stored in these
  4. 8. the most water-rich country
  5. 11. lake with salt in it
  6. 12. has the Nile river
Down
  1. 2. most polluted river in the world
  2. 3. country that uses the most water
  3. 4. the study of the land
  4. 6. when you have no water
  5. 9. water as a solid
  6. 10. when there is too much water surrounding places