Young readers learn what happens at the different stages of a river?s journey and how raging torrents can carve massive canyons and form huge waterfalls and explains how important rivers are and how dangerous they can be when they flood or run out of control. Young readers learn how mountains are formed and how they are changed by the elements and diagrams explain the science behind rock falls and landslides. Includes full color photographs, world locator maps, diagrams, case studies, recommended books and web sites, table of contents, glossary, and index. 32 pages.
