US Geological Survey
U.s. Geological Survey: Land Use History and Changing Landscapes
This resource provides links that overview the history of land use in the United States. Numerous satellite images of different areas are provided.
Independence Hall Association
U.s. History: 54 40 or Fight
See how James Polk's plan to claim the Oregon Territory, which had been shared with Great Britain since 1818, led him to victory with the slogan, Fifty-four forty or fight. Read about the settlers who traveled the Oregon Trail and why...
US Geological Survey
Usgs: Earth Surface Dynamics (Research Activities)
This site from USGS provides several activities to help understand the interrelationships among earth surface processes, ecological systems, and human activities. Also included are links to new findings and programs concerning Earth...