Australia, country and continent

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Across
  1. 4. made of rock
  2. 5. opposite of dry
  3. 6. connected with native Australians
  4. 8. relating to, or located near a coast
  5. 10. friend
  6. 11. relating to the sea
  7. 14. animals and plants that grow independently of people, usually in natural conditions
  8. 16. covered with sand or containing sand
  9. 17. someone who is in prison or found guilty of a crime
  10. 19. characteristic of the tropics (= the hottest area of the earth)
Down
  1. 1. a specific plant; or: (especially in Australia) an area of land covered with bushes and trees that has never been used for growing crops and where there are very few people
  2. 2. an Australian mammal that lives in eucalyptus trees
  3. 3. If an object or achievement is …, you admire or respect it, usually because it is special
  4. 7. connected with town or city
  5. 8. a large animal that lives in the desert and has two humps on its back
  6. 9. an area
  7. 12. unusual and exciting because of coming from far away, especially a tropical country
  8. 13. difficult to reach
  9. 15. venomous / toxic
  10. 16. extremely beautiful or attractive
  11. 17. a substance like rock, formed in the sea by groups of particular types of small animal, often used in jewellery
  12. 18. the areas of Australia that are far away from towns and cities, especially the desert areas in central Australia