AnswersFL-2003310-Physical Science CRProperties of Sound

Properties of Sound Answers

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Which refers to the change of pitch heard when the source of the sound approaches and then moves away from a stationary person?

A
Doppler effect
B
volume
C
resonance effect
D
vibration
2
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Which describes a scenario in which the Doppler effect is occurring?

A
The volume increases.
B
The pitch changes from low to high.
C
The pitch changes from high to low.
D
The volume decreases.
3

Four different observers are standing in a straight line on a street and hear a siren from a police car. Each person recorded their observations in the chart shown.

Question illustration
A
Wycleff is on block 1, Lilly is on block 4, Quincy is on block 12, and Emilia is on block 17.
B
Lilly is on block 1, Wycleff is on block 4, Quincy is on block 12, and Emilia is on block 17.
C
Lilly is on block 1, Wycleff is on block 4, Emilia is on block 12, and Quincy is on block 17.
D
Wycleff is on block 1, Lilly is on block 4, Emilia is on block 12, and Quincy is on block 17.
4

Dewayne, a pianist, wants to compare sound quality. Which scenario describes how he could do this?

A
He plays two different notes on two different pianos at a different volume.
B
He plays two different notes on the same piano at the same volume.
C
He plays the same note on the same piano at a different volume.
D
He plays the same note on two different pianos at the same volume.
5

Which refers to the highness or lowness of a sound?

A
pitch
B
amplitude
C
frequency
D
softness
6

Jamie hears a high-pitched sound that then changes to a low-pitched sound. What is most likely occurring?

A
frequency
B
the Doppler effect
C
the resonance effect
D
intensity
7

Which would describe a situation in which the Doppler effect is occurring?

A
Sheila notices an increase in volume as an object approaches her.
B
Brad hears an object increase in loudness as it is vibrated at its natural frequency.
C
Judy notices an increase in intensity as an object is vibrated at its natural frequency.
D
Damian hears a change in pitch as an object moves past him.
8

What is the difference between sounds that have the same pitch and loudness?

A
the standing wave
B
the natural frequency
C
the sound quality
D
the resonance
9

How is a less-intense wave different from a more-intense wave?

A
It has fewer decibels.
B
It has a higher pitch.
C
It has more volume.
D
It has more energy.
10

Which refers to the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound?

A
period
B
compression
C
amplitude
D
intensity

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