If you chew or make a "raspberry" while viewing an LED light source, the light will appear to wiggle or flicker. It is not because of the light itself, but because of the vibration of your skull! Have your physics class give this a try...

In this sound worksheet, students use materials such as string, cups, paper clips and more to observe the vibrations made. Students then record their results.

Students use many different materials and resources in order to study and identify sounds that are loud or soft, high or low, pleasant or unpleasant.

Second graders study how sound is produced by vibrations and is transmitted through matter in all directions. They observe how sounds are produced and identify the ways in which sound travels.