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15 Cards in this Set
- Front
- Back
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What is a vibration?
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a rapid back and forth movement
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How does sound travel?
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as waves
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What is volume?
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how loud or soft a sound is
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What is pitch?
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how high or low a sound is
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What is a sound receiver?
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the object receiving the sound
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What is a sound producer?
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the source of the sound
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Give four examples of materials that sound can travel through.
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water, wood, metal and air
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What happens to the sound if there is absolutely nothing, not even air, around a ringing alarm clock?
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The sound won't be heard because there is nothing for the sound to travel through.
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About how fast does the sound that we hear travel through the air to our ears?
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about 700 miles per hour (mph)
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Does sound always travel at the same speed?
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No, sound travels at different speeds through different materials (mediums).
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How does an echo occur?
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An echo occurs when sound waves travel in one direction, hit something, and bounce back. That's why you hear the sound again later.
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How do vibrations create sound waves?
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A vibrating object causes neighboring particles to bump into each other. Those particles move out in waves away from the vibrations.
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Your guitar has just one string. How might you change the pitch?
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If you tighten or shorten the string, the pitch will get higher. If you loosen or lengthen the string, the pitch will get lower.
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Which type of energy is formed by vibrating objects:
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sound energy
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Where would you be traveling in complete silence?
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in outer space
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