Purpose
To compare the loudness of sound traveling through
air and solids.
| Procedure |
| 1. |
Place
the end of one of the craft sticks
between
your teeth. |
| 2. |
Gently
rub your finger against the other end
of
the stick. You will hear a loud rubbing
sound. Discard the stick. |
| 3. |
Hold
the other stick in one hand, and with the
fingers of your other hand gently rub the
other end of the stick. You will hear a
low rubbing sound or no sound at all. |
So Now You Know
Sounds that travel through air aren't as loud
as sounds that travel through solids. Most of
the noise you make when you chew is heard only
by you. This is because the sound goes through
the bones in your head right to your ears, not
into the air.
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