What does sound need in order to travel?

True or False? Sound travels faster in water than in air.

What do we call the loud noise made by airplanes when they exceed the speed of sound?

In what medium will sound travel the fastest?

What is the speed of sound in dry air?

True or False? Most passenger airplanes travel at around two times the speed of sound.

What do we call the matter that is used to transport a sound wave?

What unit of measure is used to measure the loudness of sound?

True or False? Loud sounds over a long period of time can damage your hearing.