Sound Waves Instruction and Practice #2 Review

An ambulance emits a frequency of 450 Hz from its siren. What frequency is heard by a man as the ambulance moves toward him?

• more than 450 Hz

• less than 450 Hz

• exactly 450 Hz

• zero Hz

Tags

NGSS.HS-PS4-1

As the source moves west, which person hears the highest pitch?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

What is the Standard International unit for intensity?

• Decibel
• Degrees

• m/s

• s

Consider the intensities of the sounds listed below. Which has the greatest amplitude? Which one has the lowest amplitude?

• Highest Amplitude is going to be the jet engine (highest decibel) Lowest Amplitude is going to be whisper.

• Highest Amplitude is going to be whisper. Lowest Amplitude is going to be the jet engine (highest decibel).

• Highest Amplitude is going to be normal conversation. Lowest Amplitude is going to be a rock concert.

• Highest Amplitude is going to be a ticking watch. Lowest Amplitude is going to be a rock concert.

Tags

NGSS.MS-PS4-1

Which best describes loudness?

• the subjective measurement of the intensity of sound

• the frequency of a sound wave

• the speed at which sound travels

• the direction from which sound comes

Tags

NGSS.MS-PS4-1

What happens to the frequency of a sound wave as the source moves away from an observer?

• The frequency remains the same

• The frequency decreases

• The frequency increases

• The frequency becomes zero

Tags

NGSS.HS-PS4-1

How does the amplitude of a sound wave relate to its loudness?

• Amplitude is inversely proportional to loudness

• Amplitude does not affect loudness

• Higher amplitude means higher loudness

• Higher amplitude means lower loudness

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

Which of the following best describes the Doppler effect?

• A change in the frequency of a wave in relation to an observer moving relative to the source of the wave

• A change in the speed of sound due to temperature variations

• A change in the amplitude of a sound wave due to distance

• A change in the direction of sound waves due to obstacles

Tags

NGSS.HS-PS4-1

What is the effect of temperature on the speed of sound in air?

• Speed of sound decreases with increasing temperature

• Speed of sound increases with increasing temperature

• Speed of sound remains constant regardless of temperature

• Speed of sound becomes zero at high temperatures

What happens to the wavelength of a sound wave as the frequency increases?

• The wavelength remains the same

• The wavelength decreases

• The wavelength increases

• The wavelength becomes infinite

Tags

NGSS.HS-PS4-1