This PowerPoint presentation is the second of two lessons in a unit titled, "Investigating Motion", which includes the lessons, "How is Motion Measured?" and "What Affects Motion". These are all based upon information from the fifth grade Scott Foresman Science textbook. This second lesson contains fourteen SMARTBoard slides that present students with information about inertia, friction, air resistance, and action and reaction forces. This PowerPoint presentation, as well as the other lesson in the series, were designed by Marie Wimsett.