This series introduces viewers to physical geology, the study of the geologic events that have shaped, and continue to change, or planet. "Birth of a Theory" explores plate tectonics; "Plate Dynamics" illustrates spreading, convergence an d subduction and other effects of plate motion. "Mountain Building" or orogeny, is profiled next, and the complexities of rock strata are considered in "Earth’s Structures". Produced and directed by Robert Lattanzio; host James Sadd. Series study guide available. Closed captioned.