The Rock Cycle Unravels the complex processes that create, change and break down earth materials. Spectacular examples are used . Thunderstorms Superb footage with explains how thunderstorms develop to produce rain,hail and lightening. Microbursts, tornadoes and water spouts are discussed. Vanishing Forests Explore the wonders of earth's diverse and biologically rich forests and understand why their global destruction represents the most serious ecological crisis of our time.
Volcanoes Shows the examples of earth's most dramatic agents of geologic change.
Wind, gravity, temperature and chemical reactions all break down rock formations to form soils, river deposits and dunes. 20 minutes each . . . High . . . Level I program . I Series More Earth Science. . .