Earth's Changing Surface DVD
Underground expeditions and satellite navigation give students an exciting introduction to geology and geography.
- GPS: Mapping Earth's Surface: Explains an innovative mapmaking technology.
- Soil Formation in America's Prairies: Traces the origins of a fertile region of our country.
- Exploring Caves: Leads students on a spelunking expedition into one of Earth's last frontiers.
- The Grand Canyon: Investigating Our Geologic Past: Reveals how exposed layers of rock give scientists a snapshot of earth's history.