| 1. | How does your throat produce vibrations needed for sound waves to occur? |
| a. | | just by talking! |
| b. | | by the highness or lowness of your voice, as you talk it produces the wave |
| c. | | the movemnet of air through the vocal cords causes them to vibrate. THe vibrating vocal cords produce sound waves |
| d. | | As you talk your throat vibrates back and forth creating a virbration that will eventually turn into a wave because of the little space it has to go back and forth
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| 2. | An object that is vibrating fast has a high frequency and will make a ________ ( high or low) pitched sound. |
| a. | | Low |
| b. | | Neither |
| c. | | No such thing |
| d. | | High
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| 3. | An Object that is vibrating slowly has a low frequency will make a __________ ( lol, or high) pithched sound |
| a. | | High |
| b. | | Low |
| c. | | Neither |
| d. | | Both ( HIGH AND LOW)
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| 4. | What keyword mathces this defenition:
the quality of the highness or lowness of a sound. |
| a. | | hertz |
| b. | | resonace |
| c. | | pitch |
| d. | | The Doppler Effect
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| 5. | What keyword mathces this defenition:
Unit for mesuring frequency and pitch one complete wavelenght per-second. |
| a. | | Pitch |
| b. | | The Doppler Effect |
| c. | | Ultrasound |
| d. | | Hertz
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| 6. | What keyword mathces this defenition:
Sound Waves in the range above 20,000 hertz. |
| a. | | UltraSound |
| b. | | Pitch |
| c. | | Resonance |
| d. | | Hertz
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| 7. | What keyword mathces this defenition:
Strenghthening of a sound wave when it combines with an object's natural vibration. |
| a. | | Doppler Effect |
| b. | | Pitch |
| c. | | Resonance |
| d. | | Hertz
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| 8. | What keyword mathces this defenition:
The change in observed pitch that occurs when the source or the one who hears a sound is moving. |
| a. | | Hertz |
| b. | | The Doppler effect |
| c. | | Pitch |
| d. | | UltraSound
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| 9. | Hertz ( Hz) refers to the frequency of the wavelenghts per second. One Hertz is equal to 1 wavelenght per second... So 15 Hertz= ______ ( a number) wavelenghts per second! |
| a. | | 1 |
| b. | | 10 |
| c. | | 12 |
| d. | | 15
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| 10. | Hertz ( Hz ) refers to the frequency of the wavelenghts per second one hertz is equal to 1 wavelenght per second. So 30 wavelenghts per-second is = ________( a number ) Hz.. |
| a. | | 1 |
| b. | | 20 |
| c. | | 30 |
| d. | | 15
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| 11. | Wave "A" jas a frequency of 40 Hertz. Wave "B" has a freqency or 80 Hz, Which wave produces the higher-pitched sound? Explain your answer. |
| a. | | Wave B has a higher pitch sound, because it has higher hertz, frequency, and produces a higher pitched sound. |
| b. | | Wave A has a higher pitched sound, because if has lower hz, lower freqency, and produces a lower pitch! |
| c. | | Neither of them! |
| d. | | Both of them
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| 12. | What is sound? |
| a. | | A wave that is produced by a vibrating object, and travels through matter. |
| b. | | A vibrating object that travels through a medium, |
| c. | | A longnitudinal Wave |
| d. | | Just a medium
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| 13. | What do sound waves have in common with mechanical waves? |
| a. | | They Have nothing in common, |
| b. | | they both have something to do with sound. |
| c. | | They Transfer energy through a medium. |
| d. | | they both are waves
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| 14. | How are sound waves produced? |
| a. | | By a vibrating object. |
| b. | | A vibrating object pushes and pulls on the medium aroind it and sends out waves in all directions. |
| c. | | By a wave |
| d. | | They arent produced!
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| 15. | How are sound waves detected by ear? |
| a. | | The shape of a human ear helps it collect sound waves. And your outer ear collects sound waves, the hammer, anvil, and the stirrup carry vibrations to the inner ear.Plus one of the main parts of the inner ear is the cocleha, it sends a messafe to the brain. |
| b. | | Its natural |
| c. | | A vibrating object forces in. |
| d. | | Its not detected by the ear, its detected by the brain.
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| 16. | What are the two main factors of the speed of sound? |
| a. | | There are no 2 main factors |
| b. | | 1.The material, such as air and water. 2. the Wave itself. |
| c. | | 1. The material that makes up the medium, such as air and water. 2.The tempature. |
| d. | | 1. The Tempature. 2. The wave itself
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