Blog 9: UFO Ball

From third to fifth grade, every year I went to an annual "space camp" called Future Flight Hawaii.  Although a lot of my friends think it's funny that I went to a space camp, it was still one of the vest experiences of my life.  Every year I came home with fun and interesting toys that was related to the things we learned at camp.  One of the things I brought home was this UFO ball.  Like the chicken Mrs. Chen used in class, this ball only lights up when you touch both metal strips at the same time.  This is because to have a current, you need two things, 1) a voltage difference and 2) a connected path.  The battery provides that voltage difference and touching both of the metal strips, which are conductors, provides the connective path for the current to flow through you and then the ball.  That is why when you take of either one of your fingers, the ball will stop flashing and making noise.