S8P4 Key Terms

To raise the pitch of the sound caused by a sound wave __________.

• increase the wavelength of the wave

• decrease the amplitude of the wave

• decrease the energy of the wave

• increase the frequency of the wave

How do sound waves move in air?

• the wave particles diffract around a barrier

• the wave particles move in a curvilinear motion

• the wave particles move via acceleration; that is, they increase speed

• the wave particles displace one another, with particles replacing each other

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

The graph that BEST represents the speed of sound relative to the density of the medium it is traveling through is

• A

• B

• C

• D

Tags

NGSS.MS-PS4-2

Sound becomes softer at a distance because the ________________.

• wavelength gets longer with distance, decreasing its amplitude

• energy of the sound wave is spread over a greater area, decreasing its intensity

• frequency of the sound wave becomes higher, increasing its pitch

• speed of the wave increases with distance, decreasing its frequency

Tags

NGSS.MS-PS4-1

As air temperature _________, the speed of the sound wave ___________.

• decreases; increases

• increases; decreases

• decreases; decreases

• The temperature of the air does not affect the speed of the sound wave.

Tags

NGSS.HS-PS4-1

Suppose that two sound waves passing through the same medium have different wavelengths. Which of the following is most likely to be the reason for the differing wavelengths?

• nature of the medium

• differences in amplitude

• differences in frequency

• the type of wave

Which type of wave would actually slow down when moving from the air into the ocean?

• sound waves

• light waves

• earthquake waves

• ocean surface waves

Tags

NGSS.MS-PS4-2

Suppose a mechanical wave is traveling through Medium A. When the wave enters Medium B, it speeds up. Which of the following statements is true about Medium A and Medium B?

• Medium A is a solid and Medium B is a gas.

• Medium A is a liquid and Medium B is a solid.

• Medium A is a gas and Medium B is a vacuum.

• Medium A is a vacuum and Medium B is a liquid.

Tags

NGSS.MS-PS4-2

Steven turns up the volume on his stereo. The stereo sends an electrical signal to the speakers. The signal changes the sound’s ____________.

• frequency

• wavelength

• speed

• intensity

Using your knowledge of the properties of the different states of matter, determine which state of matter would travel the fastest.

• liquid carbon dioxide

• gaseous carbon dioxide

• dry ice – solid carbon dioxide

• none – sound travels at a constant rate

Tags

NGSS.MS-PS3-1