Riddles about Sound

Think about the following riddle: If a tree falls in a forest and no one is there to hear it, does the falling tree make a sound? Must you hear a vibration for it to be sound? Is the energy produced by the vibration a sound if no one hears it? The falling tree

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Develop your own definition for sound. Sound is

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What is a medium?

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Explain in your own words how elasticity affects the speed of sound waves.

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How could you use this information to describe what happens when you talk to a friend under the water in a pool and above the water in a pool?

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Why does the sound travel faster in a solid medium?

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For both of the graphs above, give an example of real life sounds that could make the two graphs.

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The quieter noise could be made by...

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The louder noise could be made by...

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Which wave is the loudest?

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