sound. what do you hear? did you ever wonder how you hear these things?
DESCRIPTION
DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?TRANSCRIPT
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SOUND
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What do you hear?
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What do you hear?
DID YOU EVER WONDER HOW YOU HEAR THESE THINGS?
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WAVES
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Transversal Waves
Crest
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Longitudinal Waves
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AMPLITUDE – Height of the waveThe higher the amplitude, the louder the sound
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Frequency – Number of waves per second.High frequency, higher the pitch
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SOUND WAVES
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Must travel in a MEDIUM.
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SPEED OF SOUND
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SOUND TO THE EAR
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How a trumpet works!
http://www.youtube.com/watch?v=olA3TrgnK7o&safety_mode=true&persist_safety_mode=1&safe=active
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How a drum works!
http://www.youtube.com/watch?v=jR17iCbMMOA&safety_mode=true&persist_safety_mode=1&safe=active
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How an electric guitar works!
http://www.youtube.com/watch?v=lBAZepM5F_0&safety_mode=true&persist_safety_mode=1&safe=active
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How a cell phone works!
http://www.youtube.com/watch?v=xv9dRENgDoc&safety_mode=true&persist_safety_mode=1&safe=active
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REVIEW
SOUND TRAVELS IN ___________
The higher the amplitude, the _________ the sound
The higher the frequency, the __________ the pitch
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REVIEW
In what medium does sound travel fastest?
Solid, liquid or gas
Sound is usually measured in _________. Humans hear from _____ to ______ Htz
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Label the parts of the waves
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What did you learn today?