The Dust Bowl

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Across
  1. 2. Ecosystem located in Great Plains, one of two most dominant grasses
  2. 3. One of the worst dust storms to ever occur and caused lots of damage to the economy and agriculture
  3. 4. Very large expanse of flatland, located east of Rocky Mountains
  4. 6. Plowing to a depth of water under 50cm
  5. 7. Largest mountain system in North America, ranges from 2500 ft to 6000 ft
  6. 9. Subregion of the Great Plains, mainly in the Western United States
  7. 10. When strong winds blows loose sand or dirt
  8. 11. Crop and live stock production, farming
Down
  1. 1. Part of North America that had lack of surface water and timber
  2. 5. Upper layer of soil, where most of Earth's biological soil activity occurs
  3. 8. A period of severe dust storms