Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
Energy |
the ability to cause a change in matter. |
|
|
energy
|
the ability to cause a change in matter
|
|
|
The way a sound is produced and transmitted |
vibrating matter. |
|
|
a type of wave a sound is |
compression wave |
|
|
compressions |
areas of the sound wave where the molecules bunch up |
|
|
medium |
the material that the sound wave is moving through |
|
|
rarafactions |
the areas of the sound wave where the molecules spread out |
|
|
wavelength |
distance between a point on one wave and the same point on the next wave |
|
|
frequency |
the number of times a sound source vibrates in one second |
|
|
what happens to wavelength if the frequency increases? |
the wavelength gets shorter |
|
|
what happens to wavelength if frequency decreases? |
the wavelength gets longer |
|
|
acoustics |
the science of sound and its effect on people |
|
|
pitch |
highness or lowness of sound |
|
|
amplitude |
the height of a sound wave |
|
|
oscilloscope |
a machine used to study sound waves |
|
|
intensity |
how loud or soft a sound is |
|
|
solids |
the kinds of mediums where sound travels fastest |
|
|
hertz |
a unit to measure frequency |
|
|
three things that effect intensity |
1 distance 2 amplitude 3 density |
|
|
vacuum |
the type of medium that sound cannot travel in |
|
|
what type of pitch so small objects have |
high pitch |
|
|
decibels |
the unit used to measure intensity |
|
|
why do large objects have a lower pitch |
they vibrate more slowly |
|
|
what happens to frequency if the wavelength gets longer? |
frequency decreases |
|
|
what happens to frequency if the wavelength gets shorter? |
frequency increases |
|
|
ultrasonic sounds |
sounds above 20,000 hertz |
|
|
infrasonic sounds |
sounds below 20 hertz |
|
|
audible frequency range |
20-20,000 hertz |
|
|
Doppler effect |
the change in pitch of a moving source making sound |
|
|
if you make an object thicker what happens to the pitch |
the pitch gets lower |
|
|
echolocation |
using echos to locate an object |
|
|
reflection |
when a sound wave bounces off an object |
|
|
what happens when amplitude(the height of a sound wave) is decreased? |
sound gets softer |
|
|
diffraction |
when sound bends around an object |
|
|
echo |
what you may hear when a sound wave is reflected(bounces off an object) |
|
|
what is the intensity level that can instantly your hearing |
150 decibels |
|
|
reverberation |
when sound waves reflect or bounce multiple times |
|
|
what are two objects that absorb sound? |
1.carpet 2.foam |
|
|
salt bounce |
the activity that proved sound is energy |
|
|
tin-can telephone |
the activity that proved sounds are vibrations |
