sound project- string telephones by, Abby & Emma

                               SOUND EXPERIMENT 

When you make string telephones you tie a string to two plastic cups and add paper clips, then you talk to the person on the other side and you can have a conversation. A three way call is possible you just add a third cup, more string and a third paper clip. To hear the people talking you half to pull the string tight to here the sound, If you don't the vibration will stop and the sound won't make it through. ~ Emma

     Today we did a sound experiment.  We made a phone out of string and plastic cups. It worked really well!  The way the phone works is when the string vibrates, the sound waves move across the string from one cup to another.  We also made a three way call by adding one string and cup to the middle.  That also worked very well.  We had a lot of fun doing this! ~ Abby

The "3 Way" call.

Mom's Note:  This experiment was really cool, I had no idea that it would work as well as it did. 

We used just a regular plastic cup, some twine, and paperclips.