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18 Cards in this Set

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  • Back
Q
What is sound?
A
a disturbance that travels through a medium as a longitudinal wave.
Q
What does a drumhead create when it moves out?
A
it presses the air molecules together and creates compressions in the air
Q
What does a drumhead create when it moves in?
A
it spreads the air molecules apart and creates rarefactions in the air.
Q
Through what mediums can sound travel?
A
gases, liquids, and solids
Q
When sound waves pass through a hole, what do they do?
A
The sound waves spread out, a process called diffraction.
Q
What is a larynx?
A
a person's voice box
Q
Through what type of medium does sound travel fastest?
A
solids
Q
Through what medium does sound travel slowest?
A
gases
Q
What causes sound to travel at different speeds?
A
The properties of the medium it is traveling through.
Q
What 3 properties of a medium determine the speed of sound?
A
1. elasticity
2. density
3. temperature
Q
What is elastisity?
A
The ability of a material to bounce back after being disturbed.
Q
What is density?
A
how much matter (mass) there is in a given volume or space.
Q
What is temperature?
A
How hot or cold a medium is measured by a thermometer.
Q
If the medium is colder, does sound travel faster or slower?
A
slower
Q
If a medium is more elastic, will sound travel faster or slower?
A
faster
Q
What type of medium is most elastic, solids, liquids, or gases?
A
solids are most elastic
Q
If a medium is more dense, does sound travel faster or slower?
A
slower
Q
Does sound travel faster or slower at high altitude than at ground level?
A
Sound travels slower at high altitude because it is colder.