Sound Waves and Hearing

What is a vibration?

• The complete back-and-forth motion of an object.

• A compression on a wave.

• A transverse wave.

• A rarefaction 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. 

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

If the distance represented by the letter A were increased, how would it change the way the sound was heard?

• The sound would be higher. 
• The sound would be lower. 
• The sound would be softer. 
• The sound would be louder. 

Tags

NGSS.MS-PS4-1

What does pitch depend on?

• amplitude 
• frequency
• intensity 
• volume of sound

When a sound is louder what measurement gets bigger?

• Frequency 
• Amplitude 
• Wavelength 
• Crest

Tags

NGSS.MS-PS4-1

A wave that requires a medium through which to travel

• mechanical wave
• chemical wave
• electromagnetic wave
• pitch

Sound is produced by

• music
• vibrations of molecules
• Electromagnetic Waves 
• Transverse Waves 

If distance C on the diagram increased, what would happen to the pitch? 

• The pitch would be louder. 
• The pitch would be softer. 
• The pitch would be higher. 
• The pitch would be lower. 

Tags

NGSS.MS-PS4-1

Which feature of sound is determined by amplitude?

• Pitch
• Smoothness
• Loudness
• A Wave

Tags

NGSS.MS-PS4-1