1.
Sound is a form of ________ we can hear.
2.
________ produce sound.
3.
Guitar produces sound when the ________ vibrate.
4.
Drum produces sound when the _______ is hit.
5.
Each key on a _______ is connected to a hammer. When the key is pressed, the hammer strikes a metal wire.
6.
_______ instruments produce sound when the coloumn of air vibrates.
7.
______ sound has more energy than soft sound.
8.
The greater the distance from the source of a sound, the softer the sound.
9.
Sound can travel through solid, ______ and gas.
10.
Sound cannot travel through ________.
