How Sound Travels
Good Vibrations
Sound
Sound Vocabulary
Bonus
100
What type of waves carry sound?
mechanical/ compressional
100
A vibrating source creates what?
Sound, Sound Waves, or Vibrations
100
Would sound travel faster on a cold day or a warm day?
warm
100
What word tells how high or low a sound is?
Pitch
100
What do humans use for sound receivers?
EARS!
200
Sound travels slowest through what medium?
Air
200
What travels on a sound wave?
energy
200
Loud sounds travel ____________ as soft sounds.
at the same speed
200
Define volume?
How loud or soft a sound is
200
What is it called when you hear the pitch of a sound change due to movement?
Doppler effect
300
Sound travels fastest through what medium?
Solid
300
For an object to become higher in pitch it must first become _________ in length?
shorter
300
Why can a singer break a glass when she sings?
causes the glass to vibrate at it's natural frequency.
300
What are vibrations?
The shaking that produces sound
300
What is a sound below 20 Hz called?
subsonic
400
Why would there be no sound in space?
Because there is no medium for the sound to travel through
400
Which creates a higher pitch a low frequency or a high frequency?
High Frequency
400
What do we measure the loudness or softness of a sound in ?
Decibels
400
Define medium
The object a sound travels through
400
Frequency is measured in?
Hz
500
If you were swimming with a friend, and your friend was under water while you were above water who would hear the sound of a passing boat first?
The friend under water
500
Which frequency produces long spread out sound waves?
Low Frequency
500
Above what Hz can most people over age 15 not hear? What is this called?
20,000 Hz, Ultrasonic
500
What word tells the rate at which sound waves travel?
Frequency
500
Explain why sound travels faster through a solid than through a liquid.
Because the molecules are closer together in a solid.
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