Show:
The Basics of Sound Waves
How Do Sound Waves Interact?
Speed of Sound
Loudness vs Pitch
Doppler Effect
100
Sound waves are this type of wave.
longitudinal waves
100
What is it called when sound waves bounce off surfaces?
reflection
100
Sound usually travels fastest in this.
solids
100
The pitch of a sound depends on this.
the frequency of the sound wave
100
The change in ________ of a wave as its source moves in relation to an observer is call the Doppler Effect.
frequency
200
Sound waves begin with this.
a vibration
200
What is it called when sound waves meet and interact with each other.
interference
200
The more elastic a medium, the ________ sound travels.
faster
200
Sounds that are too high for humans to hear are called...
ultrasound
200
If a sound source is moving away from you, you will hear a ___________ pitch.
lower
300
Sound waves need these to travel through.
a medium
300
What is it called when sound waves bend and spread out.
diffraction
300
Sound travels more ___________ in dense materials.
slowly
300
What is the loudness of a sound is measured in?
decibels
300
If a sound source is moving toward you, you will hear a ________ pitch.
higher
400
The distance from compression to compression in a sound wave is called what?
a wavelength
400
An echo is an example of this.
reflection
400
Sound travels more slowly at ____________ temperatures.
lower
400
The greater the energy used to make a sound, the _______ the sound.
louder
400
True or False? You are on a moving train and the whistle blows. Due to the Doppler Effect, you would hear a change in the whistle's pitch.
false
500
The direction air particles move when they vibrate in a sound wave.
parallel to the direction of the wave
500
Sound wave ____________ through openings and around barriers.
diffract
500

In 1947, Captain Chuck Yeager became the first person to travel faster than the speed of sound in this...

a plane
500
The amount of energy a sound wave carries per second through a unit area.
intensity
500
What is the name of a high energy wave that forms when sound waves overlap because the sound source is moving faster than the speed of sound.
a shock wave