United States

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Across
  1. 2. areas that they influence
  2. 3. a place where buyers and sellers deal for grain
  3. 5. artificial waterways
  4. 8. communication by electronic means
  5. 9. a dark-colored organic material
  6. 10. the band of Southern states from Carolina to Southern California
  7. 13. a very large city
  8. 14. an imaginary line between the Appalachian Mountains and the Atlantic coastal plain
Down
  1. 1. the average number of days between the last frost of spring and the first frost of fall
  2. 4. large pipes that carry water over long distances
  3. 6. tall building equipped with machinery for loading, cleaning, mixing, and storing grain
  4. 7. a dry, treeless plain that sprouts grasses and mosses only in the summer
  5. 11. the marshy inlets of lakes and rivers
  6. 12. rank
  7. 13. tropical trees that grow in swampy areas