S8P4 D

If we compare and contrast electromagnetic waves with sound waves, all BUT one statement is true. That is

• sound waves require a medium to travel while electromagnetic waves do not.

• electromagnetic waves can travel through the vacuum of space while sound waves cannot.

• electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere.

• sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

The diagram shows a wave. The quantity shown is the amplitude. This quantity is directly proportional to which of these other quantities?

• Energy

• Frequency

• Period

• Wavelength

Tags

NGSS.MS-PS4-1

An old movie poster used a quote "In space, no one can hear you scream!" Why this is true or not true?

• The quote is incorrect, you can hear sound in outer space.

• Sound cannot be polarized. So, you cannot hear sound in space.

• Sound is an electromagnetic wave and needs no medium to travel through.

• Sound needs a medium for the wave to vibrate and there is nothing in space to vibrate.

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NGSS.MS-PS4-2

Which of these are not mechanical waves and can be used to send a signals to satellites orbiting the earth?

• sound waves

• radio waves

• both sound waves and radio waves

• neither sound waves or radio waves

Maria talked so loudly that Sarah could hear her without the phone.

• higher crest.

• higher frequency.

• longer wavelength.

• greater amplitude.

Tags

NGSS.MS-PS4-1

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

Tags

NGSS.MS-PS4-1

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

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.HS-PS4-1

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

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