Chapter 6

Sound comes from

a pattern of disturbance caused by the movement of energy traveling through a medium as it goes away from the source

the substance through which sound travels (can be solid, liquid, or gas)

a very small portion of matter

frequency of sound (sound is also characterized by amplitude and time period)

how fast vibrations travel through a medium

Approximate speed of sound in air

• 157 m/s

• 239 m/s

• 343 m/s

• 411 m/s

• 433 m/s

Speed of Sound travels approximately _______ in water

• 1300 m/s

• 1400 m/s

• 1500 m/s

• 1600 m/s

• 1700 m/s

Speed of Sound travels faster in iron than in the air

• True

• False

Sound travels in only one direction away from its source

• True

• False