Bill Nye: The Science Guy

Season 1 Episode 12


Aired Unknown Nov 26, 1993 on Disney Channel
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Episode Summary


Listen up, scientists. Bill Nye is here to make some noise in the "Sound" episode.
Your vocal cords do it. Speakers playing rock music do it. Even a school bell does it. They all vibrate; and
 that's how sound is made. Plucking a stretched rubber band makes the rubber band vibrate. Air molecules
around the rubber band move, pushing other air molecules. As the rubber band continues to vibrate, it
sends waves of sound through the air. It's a lot like the ripples you see when you drop a rock into a pond.
You hear sound when rippling air pushes on tiny bones in your ears. Nerves in your ears send a message
to your brain about the sound you're hearing.
Different sounds make different patterns of waves with different distances between them. Plucking,
banging, whispering, and yelling are all vibrations in air, yet they all sound very different. Sound vibrations
can be thought of as waves moving through molecules. Low-pitched sounds have big gaps between
waves, while high-pitched sounds have waves that are bunched together. Loud sounds have more
molecules moving and more energy than soft sounds.
Sound is much more than music. It's not just's science.


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