| A | B |
|---|
| silo | tall, round airtight building for storing grain |
| Washington D.C. | first planned city in the nation |
| harbor | places along shorelines for ships |
| aqueduct | large pipeline carrying water |
| mangrove | tropical tree that grows in swampy coastal areas |
| grain elevator | tall buildings equipped with machinery for loading, cleaning, mixing and storing grain |
| trans-Alaska pipeline | means of carrying oil from Prince William Sound |
| suburb | mostly residential area on the outer edges of a city |
| grain exchange | place where buyers and sellers deal for grain |
| New England | six-state region of the Northeast |
| transcontinental railroad | transportation network across the nation which lowered prices |
| bayou | marshy inlet of a lake or river |
| Midwest | situated roughly in the center of the nation |
| megalopolis | very large city |
| growing season | number of days from spring frost to fall frost |
| Sunbelt | southern states stretching from Carolinas to California |
