More Sounds

Students explored sound through books and various experiments.  Students were given rubber bands and asked to make sound. Next students were given geo boards with rubber bands.  Students discussed vibrations and the different pitches different bands made.
Students paired up and were given a balloon.  They were given directions of one student to talk near the balloon and the other would listen.   Students then discussed their voices produced sound waves that traveled through in and around the balloon.
Then they  explored sound waves by using a tuning fork.  When they hit the tuning fork on the table and placed it in water they watched as the water moved.  You can't see vibrations, but dipping the fork in water made it anything but invisible.
Last they created a bear cup that would  growl.    Students discussed questions about how the string,  vibrations and the cup all worked together to make it happen.
The unit was filled with lots of fun and learning.