The Earth is formed by accretion of spatial particulates and large masses and eventually formes an outer crust. Video follows with speculation of early plates...
Video clip from "Plate Tectonics," a 20-minute Earth science educational video for middle school (grades 5-9). "Plate Tectonics" is one of four videos in the...
Continental Drift and Plate Tectonics explores the inner earth and its surface. The 1906 San Francisco earthquake and the Mount St. Helen's volcanic eruption are...