Sound Waves

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

A soft sound has a _________ amplitude and a loud sound has a _____________ amplitude.

• large, small

• small, large

Tags

NGSS.MS-PS4-1

High frequency sound will have a ____________ wavelength.

• long

• short

How close together the sound waves are

• Frequency

• Amplitude

• Wavelength

The volume of a sound (how loud it is) is a result of its

• Frequency

• Amplitude

• Wavelength

What medium does sound travel through slowest?

• gas
• solid
• liquid
• trees

The number of wavelengths that pass a point each second

• frequency
• wavelength
• pitch
• amplitude

Material (matter) through which a wave travels

• medium
• Doppler Effect
• sound
• pitch

Tags

NGSS.MS-PS4-2