This PowerPoint presentation is the third of four in a unit titled, "The Changing Earth", which includes the lessons, "What Are the Earth's Layers?", "How Does the Earth's Crust Move?", "What Changes the Earth's Surface?", and "How Do Rocks Reveal Changes on the Earth?". These are all based upon information from the fifth grade Scott Foresman Science textbook. This particular PowerPoint presentation contains twenty slides that present students with information about weathering (including physical and chemical weathering), erosion, and deposition. This PowerPoint presentation, as well as the others in the series, were designed by Marie Wimsett.