Balloon Rockets!!

On Tuesday we did a experiment about Balloon Rockets. We had some string a straw and a Balloon first we blew the Balloon up then we held the straw on the balloon then we put tape onto the straw to make the straw stay on it. Then we put the string through the straw and tied it to a desk. Then we let the balloon go so it inflated it raced along the string to the other side of it. It relates to change by inflating deflating and by going slow and fast and as the balloon goes down it changes position. There are two types of energy's they are elastic and gravitational energy. They are potential energy that is stored energy then it changes to kinetic energy.