1. In which one of the following does sound travel the fastest?
A. Water
B. Steam
C. Ice
D. Sound travel at the same speed

2. Which factor does not affect the speed of sound.
A. Temperature
B. Density
C. Distance
D. Elasticity

3. What medium does sound travel trough slowest?
A. Gas.
B. Liquid.
C. Solid.
D. Trees.

4.sound is caused by.
A. Molecules.
B. People.
C. Vibrations.
D. Space.

5.sound does not travel in space because?
A. Space is too far away.
B. There is no matter in space.
C. Space is the final frontier.
D. Space has planet. ​