Did you know sound is also a type of energy? Sound is everywhere. Sound is a special type of movement. Sound is energy that makes substances vibrate. Sound travels as vibrations that we can hear and sometimes even feel. All sounds are caused by the vibration of substances. Sound can come from different sources. You can clap your hands, stamp your feet, talk, sing, or play a musical instrument. Different vibrations will make different sounds.
How does sound travel?