physical geography

2. land fit for growing crops
4. the crest dividing north Americas major river systems into those flowing eastward and those flowing westward
5. area which is at or near the foot of a mountain region
8. Wisconsin, Minnesota, Michigan where cooler summers and rockier, less fertile soil means lots of dairy cattle
10. happens when the value of a country’s exports is less than the value of its imports
12. Dakotas, Montana, Nebraska, Kansas, Oklahoma, Colorado, Texas
13. air pollution resulting from chemical reactions involving sunlight and automobile/industrial exhaust
16. process of buying run-down homes and restoring them
18. region that lies far away from major population centers
19. events in the physical environment that can destroy human life and property
20. soil deposited by streams or rivers

1. form along the parts of the coastal plain
3. 1992 trade agreement between US, Canada, and Mexico eliminating tariffs on goods moving between these countries
6. feeling of strong political emotional loyalty to one’s own region
7. region which stretches from Nebraska to Ohio which specializes in growing corn
9. the belief that certain parts of a country should be independent
11. government districts similar to states
14. low area of land, generally surrounded by mountains
15. south of San Francisco, leading center of computer technology
17. place where magma wells up to the surface from Earth's mantle