When we hit a drum, the skin ______ making sound.
vibrates
We can use our fingers, earplugs, or earmuffs to _____ our ears.
protect
Sound travels slower when moving through a _____ because there are less molecules.
gas
Loud sounds can ______ our ears.
damage
Sound is when ________ travel through a medium.
vibrations
We can use the time a sound takes to reach us to measure ________.
distance
Sound waves travel faster when moving through a _________ because there are more molecules.
solid
Moving faster than the speed of sound creates a loud noise called a ______.
sonic boom
Light travels ______ than sound.
faster
Our ears are designed to detect sound moving through _____.
air
When we pluck a guitar string, it ______ making sound.
vibrates