A 25-minute DVD. The video The Southern Appalachians: A Changing World describes the Southern Appalachian Mountains and how the geologic events that took place millions of years ago influenced the landscape, climate, soils, and living things that can be seen there today. Spanning a vast area from Virginia to Georgia, the Southern Appalachians are some of the oldest mountains on Earth. Molded and shaped over eons by volcanism, erosion, glaciation, and other geologic forces, these mountains are known worldwide for their unusual beauty and rich biological diversity. Accompanied with a 16-page teacher's guide that summarizes the video and includes 17 suggested activities and discussion topics to enhance viewing.