Doppler Effect Vocabulary

When the car moves AWAY from you, its horn seems...

• Low pitched

• High pitched

• Normal

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NGSS.HS-PS4-1

When an ambulance move TOWARD you it sounds ________ pitched. 

• high

• low

• medium

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NGSS.HS-PS4-1

The Doppler effect occurs when an observer moves towards a wave-making source. 

• True

• False

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NGSS.HS-PS4-1

When a car moves towards you, the sound of its horn seems relatively...

• Low pitched

• High pitched

• Normal

Tags

NGSS.HS-PS4-1

Which of the following best describes the Doppler effect?

• A change in amplitude due to distance

• A change in frequency due to the motion of the source or observer

• A change in wavelength due to temperature

• A change in speed due to medium

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NGSS.HS-PS4-1

Describe how the Doppler effect explains the change in pitch of a siren as an ambulance passes by an observer.

• The pitch remains constant as the ambulance moves.

• The pitch increases as the ambulance approaches and decreases as it moves away.

• The pitch decreases as the ambulance approaches and increases as it moves away.

• The pitch is unrelated to the movement of the ambulance.

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NGSS.HS-PS4-1

After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above?

• The distance represented by C would increase.

• The distance represented by C would decrease.

• The distance represented by D would increase.

• The distance represented by D would decrease.

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Which is an example of the doppler effect?

• The delay in sound between the lightning and thunder.

• When you can no longer hear a sound as the pitch increases.

• 
  The apparent change in pitch of a police siren as it passes you.

• 
  The change in pressure in your ears when driving up a mountain.

Light can change color due to the Doppler Effect.

• True

• False

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NGSS.HS-PS4-1

NGSS.HS-PS4-3

What is the effect of the Doppler effect on the sound of a car horn as the car approaches and then moves away from an observer?

• The sound remains constant

• The sound decreases in frequency as it approaches

• The sound increases in frequency as it approaches and decreases as it moves away

• The sound increases in amplitude as it moves away

Tags

NGSS.HS-PS4-1