SOUND 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. 

Tags

NGSS.HS-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

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

Tags

NGSS.HS-PS4-1

When a sound is louder what measurement gets bigger?

• Frequency 
• Amplitude 
• Wavelength 
• Crest

Tags

NGSS.MS-PS4-1

Highest point of a wave

• crest
• trough
• wavelength
• frequency

Sound is produced by

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

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Sound is produced by -----

• Heat energy

• Low temperatures

• Vibrations

• Friction

Tags

NGSS.HS-PS4-1

True or False: Sound needs a medium.

• True

• False

The distance from the beginning of one compression to the beginning of the next compression is called a -----

• Rarefaction

• Frequency

• Wavelength

• Compression

Tags

NGSS.MS-PS4-1