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Science 3
Science Chapter 14
| Question | Answer |
|---|---|
| Loudness and pitch are important to determining | sound quality. |
| Sound | wave that is produced by a vibrating object that travels through matter. |
| The shorter the object | the higher the pitch. |
| The longer the object | the lower the pitch. |
| Disturbances | are back and forth motions that travel in the same direction as the medium. |
| Our body's sound making instrutment is | our voice box (larynx). |
| Larynx is the | voice box. |
| The middle ear consists of a hammer, anvil and stirrup are the | eardrum. |
| Sound waves vibrate particles. | sound waves vibrate particles. |
| Kinectic energy | is transferred as particles are moved by compression. (particles are moving) |
| Robert Boyle,a british scientist, used a clock | to show that sound must have a medium. |
| The closer the molecules are | the faster sound travels. |
| As temperatures increases | sound travels faster. |
| Pitch is the | highness or lowness of a sound. |
| Objects vibrating very fast produce | high-pitched sounds. |
| Objects vibrating very slowly produce | a lower-pitched sounds. |
| Cycle | one complete wave. |
| People hear in a range of | 20 to 20,000HZ. |
| Ground waves are used by elephants to communicate up to | 20 miles away. |
| Ultrasounds are waves above | 20.000Hz. |
| Resonance | is the the strengthing of a sound wave. |
| The combination of waves produces sound quality known as | TIMBRE |
| Oscilloscope is a | scientific instrument that tracks a electrical signal. |
| Christian Doppler (Austrian scientist) | wrote a paper about how pitch changes when the sound source moves towards or away from a person. |
| If frequency increases | the pitch increases. |
| What makes a sound louder? | The amount of energy a wave has determines how soft or loud sound is. |
| Decibel | the unit used to measure intensity |
| Amplification | the increased strength of an electrical signal. |
| Acoustics | the scientific study of sound. |
| Echoes | reflected sound waves |
| Echoes of ultrasound waves are used to find | food, detect underwater objects,etc |
| Echolocation | 200 squeaks/second |
| Sonar | sound navigation and ranging |
| Sonar | is used my the military to combat the enemy |
| Doppler ultrasound | is a technology that detects fluid movement through the body. |
| 3 main musical instruments | stringed, wind and percussion |
| Tech toys to record sound | telephones, phonographs and CD players |
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