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Vivid photographic images, professional video footage, and in-depth explanations detail the core concepts of earth science in this engaging DVD. An essential element in understanding the age and evolution of the Earth, rocks are analyzed for characteristics that reveal how they were formed. Visit notable formations like the Obsidian Dome and study everything from stalactites and stalagmites to intrusive and extrusive rocks. Following the educational program, you can lead students through discussion questions featured on the DVDs or incorporate these suggested activities for further in-class exploration. A teacher's guide is included and is also available online. Duration of each: 23 minute

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