Can you hear me now?

Students learned that energy can be transferred from place to place by sound.  First, students created paper cup telephones and explored how sound vibrations travel from a cup across string and into another cup.  Then, students tried to make their paper cup telephones better by changing their design. 

Next students created water xylophones and explored how pitch changes with the amount of water in the jar.  Student quickly learned that jars with more water had a lower pitch, and less water produced a higher pitch.