Earth Revealed: Introductory Geology, originally titled Earth Revealed, is a 26-part video instructional series covering the processes and properties of the physical Earth, with particular attention given to the scientific theories underlying geological principles. The telecourse was produced by Intelecom and the Southern California Consortium, was funded by the Annenberg/CPB Project, and first aired on PBS in 1992 with the title Earth Revealed. All 26 episodes are hosted by Dr. James L. Sadd, professor of environmental science at Occidental College in Los Angeles, California.
Some footage used in Earth Revealed previously had been seen in the 1986 PBS series Planet Earth.
Episodes
Module I: Introduction (February 17–24, 1992) 1. "Down to Earth" – Beginning by comparing surface conditions on the planets Venus and Mars with the living landscapes of the Earth to highlight how unique the Earth is, the episode describes the goal of the study of geology and introduces major topics the series addresses, including the Earth's heat engines, plate tectonics, volcanism, earthquakes and seismology, erosion, and natural resources such as groundwater. 2. "The Restless Planet" – The episode discusses the development of astronomical theory, including the geocentrist views of astronomers in ancient Greece and the discoveries of Copernicus, Galileo Galilei, Johannes Kepler, and Isaac Newton. It also describes the formation of the Solar System and the physical evolution of the Earth over time, including its internal structure – through the process of planetary differentiation – and development and retention of an internal heat engine, its atmosphere, its hydrosphere, and the appearance of life.
