Sound Waves

A disturbance that travels through a medium as a longitudinal wave

• sound
• wavelength
• pitch
• frequency

Bending of waves around an object (such as through a doorway)

• sound
• diffract
• pitch
• volume

travels through solids fastest because the molecules are closer together

• speed of sound
• wavelength
• frequency
• amplitude

Material (matter) through which a wave travels

• medium
• Doppler Effect
• sound
• pitch

A wave in which the vibration is in the same direction as that in which the wave is traveling; sound waves

• longitudinal wave
• ocean wave
• transverse wave
• mechanical wave

The part of a longitudinal wave where the particles of the medium are close together.

• rarefaction
• compression
• crest
• trough

A part in a longitudinal wave where the particles are spread apart

• compression
• rarefaction
• crest
• trough

A disturbance that transfers energy from one place to another without transferring energy

• wave
• trough
• pitch
• sound

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. 

If a wave is traveling at 260 m/s and has a wavelength of 0.8 m/s, what is its frequency?

• 208 Hz
• 325 Hz
• 430 Hz
• 160 Hz