Sound Unit Review

Frequency is defined as

• the number of waves that pass over a specific time

• the number of waves that pass through a prism

• the number of waves of a soundwave

• the distance between the middle line to the peak point of a wave

As the fire truck approached Mary, the pitch of the siren got higher. Once the fire truck passed and moved away, the siren's pitch got lower. This change in pitch is because of a change in the sound wave's

• concussion. 
• amplitude. 
• reflection.
• frequency. 

Match the following scenarios with their corresponding sound changes.

• If the frequency of the sound wave decreases, how would it change the way the sound was heard?

• The sound would be louder. 

• If the frequency of the sound wave increases, how would it change the way the sound was heard?

• The sound would be higher. 

• If the amplitude of the sound wave increases, how would it change the way the sound was heard?

• The sound would be softer. 

• If the amplitude of the sound wave decreases, how would it change the way the sound was heard?

• The sound would be lower. 

Tags

NGSS.MS-PS4-1

When comparing the two waves that are shown, how would Wave A (green wave) differ than Wave B (black wave)?

• Wave A and B have the same amplitude, but wave B (black) has a lower pitch.
• Wave A and B have the same amplitude, but Wave A has a lower pitch. 
• Wave A and B have the same pitch, but Wave A is a softer sound. 
• Wave A and B have the same pitch, but Wave B is a softer sound. 

Tags

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What does pitch depend on?

• amplitude 
• frequency
• intensity 
• volume of sound

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Tags

NGSS.HS-PS4-1

Highest point of a wave

• crest or peak

• trough or valley

• wavelength
• frequency

Tags

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The number of wavelengths that pass a point each second

• crest
• amplitude
• frequency
• pitch

The shorter the wavelength the  (a)  

• shorter the frequency
• higher the freuqnecy
• frequency stays the same
• less energy

Tags

NGSS.HS-PS4-1

Sound is produced by

• music
• vibrations

• Electromagnetic Waves 
• Transverse Waves 

Tags

NGSS.MS-PS4-1

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