Scooby-Doo! A Science of Sound Mystery: A Song for Zombies

Scooby-Doo! A Science of Sound Mystery: A Song for Zombies — page 3
I'm confused said Shaggy The kids were asleep in their beds How did the music get inside their houses Sound travels through air water and even walls it it's loud enough Daphne said small wavelengths for high frequency sound Sound is a kind of energy like heat and light Velma explained When something vibrates like your vocal cords or an instrument it makes sound waves The waves cause molecules to move As the molecules bump into each other they make sound large wavelengths for low frequency sound FACT FILE Sound travels through the air at 1 129 feet 344 meters per second It travels through steel at 16 404 feet 5 000 m per second