This is a virtual lab worksheet that I created to accompany the Phet projectile Motion Lab. Students learn that gravity on earth is 9.81 m/s2, and that the heavier the mass of the object being projected, the greater the distance that it project. Following this lab the teacher can teach proper graphing skills on graph paper where students plot the distance the cannonball was projected. Students learn to identify their independent and dependent variables in an experiment and which axis each should be plotted on.