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18 Cards in this Set
- Front
- 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. |