S8P4 D

Which choice BEST represents the sound waves from a soft low-pitched train rumble that suddenly shifts to a loud, high-pitched squeal of brakes?

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

Sound waves are compression waves, as seen here. The areas of low pressure within a sound wave, area A for example, are called

• amplitudes

• frequencies

• rarefactions

• troughs

Tags

NGSS.MS-PS4-1

Sound waves are longitudinal waves. The height or intensity of the wave shows its amplitude, or the energy in the wave. In the diagram of a sound wave, the section labeled B shows the area of the sound wave with the

• most amplitude and compression.

• most amplitude and rarefaction.

• least amplitude and compression.

• least amplitude and rarefaction.

Tags

NGSS.MS-PS4-1

Sarah and Maria made a telephone using two cans and a string. It was a very long string. Maria went upstairs in her house and Sarah stayed downstairs. Maria spoke softly into the can. "I can hear you!' Sarah said back. How can this happen?

• Sound waves travel through a vacuum.

• Sound waves travel from high to low.

• Sound waves travel through solids like the string.

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

Tags

NGSS.MS-PS4-2

The wave pictured represents a sound wave. Which label along the wave represents a sound with the LOWEST intensity?

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

Looking at waves A and B. Which description correctly describes the waves?

• Wave A has twice the energy because it has a frequency twice as large.

• Wave A has twice the energy because it has an amplitude twice as large.

• Wave B has twice the energy because it has an amplitude twice as large.

• Waves A and B gave the same energy because they have the same amplitude.

Tags

NGSS.MS-PS4-1

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

The energy supplied to a speaker is increased. What will happen to the sound the speaker produces?

• The sound will be lower pitch.

• The sound will become a high pitched squeal.

• The sound will be louder or greater amplitude.

• The sound will remain unchanged if the speaker is not changed.

Tags

NGSS.MS-PS4-1

If the above two waveforms were sound waves, we would hear the ___________ wave louder. If the above two waveforms were light waves, we would see the ________ wave dimmer.

• red, red

• green, red

• red, green

• green, green

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

All of the waves in the electromagnetic spectrum are _______ waves.

• compression

• longitudinal

• mechanical

• transverse

Tags

NGSS.MS-PS4-1