Sound Waves

How high or low a sound is; depends on the frequency (greater frequency= higher pitch)

• pitch
• frequency
• sound
• medium

Tags

NGSS.HS-PS4-1

A disturbance that travels through a medium as a longitudinal wave

• sound
• wavelength
• pitch
• frequency

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

A reflected sound wave

• frequency
• pitch
• echo
• rarefaction

Tags

NGSS.MS-PS4-2

A tuning fork with a frequency of 404 Hertz is struck with a soft hammer. The fork is struck a second time by the same hammer with twice as much force, and the volume, or amplitude, increases by a factor of two. What will the frequency of the second sound be? 

• 101 Hz
• 202 Hz
• 404 Hz
• 808 Hz

Which of the following would you hear as a low pitched sound? 

• sound wave with a frequency of 50 Hz
• sound wave with frequency of 10,000 Hz
• sound wave with an intensity of 10 dB
• sound wave with an intensity of 100 dB

Tags

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. 

Tags

NGSS.MS-PS4-1

What does the motion of the source of a sound cause? 

• resonance
• shock waves
• the Doppler effect
• echolocation

Tags

NGSS.MS-PS4-1

Which statement about sound waves is true? 

• Air travels with them
• They travel through a vacuum
• They exist only if heard
• They can be reflected. 

Tags

NGSS.MS-PS4-2

Which surface is the best reflector of sound? 

• bumpy and soft
• smooth and soft
• smooth and hard
• bumpy and hard

Tags

NGSS.MS-PS4-2

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. 

Tags

NGSS.HS-PS4-1