World Cultures Crossword Puzzle

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Across
  1. 3. A piece of land almost surrounded by water or projecting out into a body of water
  2. 6. A piece of land completely surrounded by water
  3. 8. Closely related group of islands
  4. 10. A man-made artificial route
  5. 12. Variety of species in an ecosystem
  6. 13. Permanently frozen ground
  7. 15. Gradual transition from fertile to less productive land
  8. 18. Protection of the environment
Down
  1. 1. Unfit for use due to the presence of unsafe atoms
  2. 2. Flat land found in arctic and subarctic regions
  3. 4. Tropical grasslands
  4. 5. The height above sea level
  5. 7. A region drained by a river system
  6. 9. Very dry with extremely high daytime temperatures
  7. 11. Hurricanes that bring heavy rain and
  8. 14. Giving off energy caused by the breakdown of atoms
  9. 16. The way people live and act
  10. 17. Complete control of the market