Our Experiment about Sound

Today in class we made an experiment about sound. This is in connection with our first inquiry into 'What is sound?"

We wrote our inquiry results together as a class.
Here is our work:

The Cup-A-Phone
How does it work?

• The string has to be tight and straight.


• You need two people.


• Sound travels in waves.


• When the string is loose you cannot hear your friend talking.


• If someone grabs the string the sound will stop.


• You can hear your friend’s voice and also feel the vibration.