| A | B |
|---|
| steam engine | an invention that made travel easier even easier by both land and water |
| Erie Canal | linked the Hudson River and the Great Lakes |
| National Road | it stretched from Cumberland, Maryland to Vandalia, Illinois |
| Industrial Revolution | the change from making goods by hand to making them by machine in factories |
| San Jacinto | the battle that ended that conflict between Mexico and Texas took place here |
| gold rush | the sudden rush of people to an area where gold has been discovered in California in 1849 |
| Oregon Trail | it went from Independence Missouri, to the West Coast |
| Mormon Trail | it went from Illinois to the Great Salt Lake |
| Rio Grande | it forms the border between Mexico and the United States |
| reference source | a book or other source that contains facts about many different subjects |
| encyclopedia | provides very general information about important people, places, topics, and events |
| atlas | a reference source that provides maps and other geographical information |
| historical atlas | a book that includes maps of important events from the past |
| CD-ROM | a reference source "read" by a computer that contains information similar to encyclopedias |
| card catalog | a listing of all the books a library contains |
| call number | a series of letters and numbers that indicate the exact location of a book in a library |
