+15 science points on completion
Dr. Beaker · Lab Chemist
Great choice, Junior Scientist! Today we're doing the "String Cup Telephone" experiment. Let me explain what we'll discover together. Your voice makes the cup bottom vibrate. The vibrations travel along the tight string to the other cup, which vibrates the air so your friend hears you — that's how sound travels!
Ask an adult to help poke a small hole in the bottom of each cup.