Geography4Kids: Biosphere: Erosion

U.S. Geological Survey: Difference between weathering and erosion and weathering and erosion

Agriculture Canada: Soil Erosion

Exploring Earth: Examples of erosion and weathering, photos of erosion examples, weathering on feldspar, and river erosion

Scholastic: Dirtmeister’s Science Reports: Erosion

Mrsciguy: Weathering

BBC Rocks and Weathering Lesson

General Information

World Book Student Ohio Resource Guide
SIRS Discoverer State Fact Guide
Ohio Historical Society History Central

Inventors

Oplin Ohio Inventors Page
Ohio Biography--Inventors
Inventors by State at About.com--Ohio

Native Americans

Prehistory: Ohio Historical Society select Prehistory from the Time Periods drop down menu
Native American Tribes of Ohio: from the Native American Languages site
One State Many Nations--Native Americans of Ohio  from Western Reserve Public Media
Oplin Ohio Indians Page (note game requires Shockwave)
Plains Indians from the Minnesota State Museum