This is a short lesson that can be easily incorporated with hands-on activities, used as an introduction, or used as a review. It focuses on three "characters:" Matter, Energy, and the Force and their relationship. There are notes at the bottom of each slide which suggest the discussion and activities to incorporate. The slideshow itself is open-ended and will allow for as much or little rigor as desired. Check out the accompanying note page that has students follow along and fill in key wor