Chapter 9 Crossword puzzle

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Across
  1. 3. tropical Savanna
  2. 5. grassland plain
  3. 7. Tropical forest
  4. 8. Low grass lands in South America
  5. 9. river in south central South America
  6. 10. organization of a society
  7. 11. Attracts people
Down
  1. 1. farming with flat surfaces and more effective farming
  2. 2. Largest mountains in South America
  3. 4. Used for clearing forest or farming
  4. 6. one of the largest rivers in South America
  5. 8. reason to migrate away from something