Sound
Sound waves & Wavelengths
How We Hear
Pitch, Frequency, and Echos
Miscellaneous
Critical Thinking
100
Sound is a kind of
Energy
100
What is the high point of a soundwave?
Crest
100
What part of the ear catches soundwaves?
outer ear
100
Frequency of the wave is?
The number of crests or troughs that pass by over a certain amount of time.
100
______ is called the medium of the sound
matter
100
Which sound will most likely travel farthest?
A. large meteors crashing in outer space
B. a whale singing in the ocean
C. a canon shooting on a battlefield
D. a crack of thunder
B. a whale singing in the ocean
200
Sound is made when objects
Vibrate
200
What is the low point of a soundwave?
trough
200
What part of the ear do vibrations move to?
middle ear
200
Pitch is caused by
the frequency of the sound wave.
200
The medium can be
a solid, liquid, or gas
200
Which glass bottle will have the hight frequency when tapped? Why? 
Bottle number 1
Bottles with less water and more air are able to vibrate more, causing them to produce a sound with higher frequency than bottles with more water and less air
300
Sound travels as
waves through matter
300
The distance between one crest or trough to the next is called a
wavelength
300
After hitting the middle ear, the waves move to the _______.
inner ear
300
High-frequency waves make the pitch_______?
High-frequency waves make the pitch_______?
high, low
300
Sound waves travel fastest through _____?
Sound waves travel slowest through____?
fastest: solid
slowest: gas
300
H. The number of crests or troughs that pass by over a certain amount of time would be slower than the smaller bells.
400
A__________is a change that carries energy from one place to another.
wave
400
Parts of the wave are bunched close together are called
Compression
400
The inner ear sends messages to the
brain
400
The study of how sounds travel and can be controlled.
acoustics
400
A sound’s volume is measured in
decibels
400
Dog whistles can be heard by dogs, but they cannot be heard by humans. Which of the following explains why?
A. Dogs can hear sounds at a higher pitch than humans.
B Dogs can hear sounds that are lower in volume than humans.
C. Dogs can hear compression waves and humans cannot.
D. Dogs can hear sounds at a lower frequency than humans.
A. Dogs can hear sounds at a higher pitch than humans
500
Sound can only travel through...
matter
500
The parts of the wave are spread out and are called
rarefactions
500
When sound waves hit the eardrum it __________?
Vibrates
500
When a sound wave hits something that is hard, like a wall, most of the waves bounce off the wall. This causes
echo
500
Sound cannot be heard in a
vacuum
500
A.
The longer the column of air, the deeper the pitch. If the pipe is shortened, the pitch gets higher.