Vibration is a back and forth motion that creates sound. Vibration involves motion either right and left or up and down on a repeating basis. Different types of motion, such as back and forth, right and left, or up and down vibrations are what form sound.

1. Types of
Motion
How is sound formed?

2. Vibration
 Vibration is a back and forth motion

3. Vibration
 Vibration is a back and forth motion

4. Vibration
 Vibration is a back and forth motion
Sound

5. Back and forth
 Motion right and left
 Or up and down