Sound is a vibration that travels through ______ . some types of matter are made of pieces too small to be seen, called _______ . molecules are the ______ pieces that matter can be broken into without changing the kind of matter. when a string vibrates, it makes molecules of gases in the air next to it _______ . a vibration that spreads away from a vibrating object is a _______ . it carries the energy from the vibrating object outward in all ______ . when sound waves reach your ______ , they make the parts inside vibrate. since air is a mixture of _______ , you may conclude that sound can travel through gases.
SOUND WAVE SMALLEST VIBRATE
MOLECULES MATTER GASES
DIRECTIONS EAR