Students will investigate Newton’s First Law of Motion by testing how different masses behave when the support beneath them is removed rapidly. Using an index card, a coin, and a cup, students flick the card to observe whether objects of varying mass drop straight into the cup or move with the card. Through repeated trials, data recording, percent-success calculations, class graphing, and a CER, students learn how inertia affects motion and why mass influences the likelihood of movement. Learni