This series introduces viewers to physical geology, the study of the geologic events that have shaped, and continue to change, or planet. The formation and structure of volcanoes are profiled in "Volcanism"; then different types of rocks formed b y magma cooling underground are described in "Intrusive Igneous Rocks". "Weathering and Soils" considers how processes on the earth’s surface such as exfoliation, decomposition and acid rain transform rocks, while "Mass Wasting&# 34; shows how natural and man-made conditions cause landslides and mud flows. Produced and directed by Robert Lattanzio; host James Sadd. Series study guide available. Closed captioned.