Across
- 2. A farming method used in dry regions in which crops are grown that rely only on the natural precipitation
- 3. A network of safe houses in the United States that helped thousands of enslaved people escape to freedom
- 6. The cultivation of seafood
- 9. A concentrated region of manufacturing industries in the northeastern and midwestern United States
- 11. Complex forest that has developed over a long period of time and is relatively untouched by human activity
- 13. A seasonal warm wind that blows down the Rockies in late winter and early spring
- 14. A large concentration made up of several large and many smaller cities, such as the area between Boston and Washington, D.C.
- 15. Economy that emphasizes services and technology rather than industry and manufacturing
- 18. A high point or ridge that determines the direction rivers flow
- 19. A member of the Arctic native peoples of North America; once known as Eskimo
- 23. The breaking away of one part of a country to create a separate, independent country
- 24. Sand or sandstone naturally impregnated with petroleum
- 27. The source of a stream or river
- 28. A large, powerful windstorm that forms over warm ocean waters
- 30. Quebec's French-speaking inhabitants
- 33. Legal proceeding in which a borrower's rights to a property are relinquished due to his or her inability to make payments on the loan
Down
- 1. To leave one's own country to settle permanently in another
- 4. A smaller river or stream that feeds into a larger river
- 5. An American colonist who remained loyal to the British government
- 7. A partially self-governing country with close ties to another country
- 8. The removal of all trees in a stand of timber
- 10. A boundary in the eastern United States where the higher land of Piedmont drops to the lower Atlantic Coastal Plain
- 12. Harvesting fish to the point that a species are depleted and the value of a fishery is reduced
- 16. Elevation above which it is to cold for trees to grow
- 17. Precipitation carrying large amounts of dissolved acids, which kills wildlife and damages buildings, forests, and crops
- 20. A mild climate region in the southern and southwestern portions of the United States
- 21. An area in which fish or sea animals are caught; a place for catching fish, the fishing industry
- 22. A resource formed in the Earth by plant and animal remains
- 25. Haze caused by the interaction of ultraviolet solar radiation with chemical flumes from automobile exhausts and other pollution sources
- 26. A musical form developed in the United States in the early 1900s, blending African rhythms and European harmonies
- 29. One of the indigenous peoples of Canada who are neither Inuit nor Métis
- 31. Process by which a body of water becomes to rich in dissolved nutrients, leading to plant growth that depletes oxygen
- 32. A channel or pipeline for carrying a large quantity of flowing water