Today we have done an interesting experiment. Measuring the movement of the balls made out of different materials powered by human breath. We used a Styrofoam ball, a big marble, a small marble, a ping pong ball, a golf ball and a tennis ball. For blowing, we used a straw and we blew with our normal breath, with a middle strength breath, and with a hard breath. We taped a ruler on a desk so we can measure the length of every ball's movement. Here are the results: with a normal breath the shortest length was traveled by tennis ball; with a normal breath the longest length was traveled by ping pong ball; the tennis ball traveled the shortest distance when powered by middle breath; the ping pong ball traveled the longest powered by the middle strength breath; the hard strength breath moved the tennis ball for the shortest length and ping pong ball for the longest length; normal breath didn't even move tennis and golf ball. What we have learned is that movement of an object is always related to its mass and the amount of energy - force needed to create its movement.