EASY
Lower Secondary Stage 8
IMPORTANT
Earn 100

How could you use a microphone and an oscilloscope to see what the sound waves made when you speak look like?

Important Questions on Sound

EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 10
Why do professional musicians, like those who play in orchestras, sometimes have problems with their hearing as they get older?
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 11

Observe the sound wave in the figure given below. Draw a sound wave that is louder but has the same pitch.

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EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 11

Observe the sound wave in the figure given below. Draw a sound wave that has the same volume but a lower pitch than the given wave.

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EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 11

Observe the sound wave in the figure given below. Draw a sound wave that has a higher pitch and a lower volume than the given wave.

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HARD
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 12

(a) How could you use a loudspeaker, a microphone, an oscilloscope and a signal generator to compare how well sound travel through different materials? Design an experiment to compare wood, glass and steel.

(b) State the precautions you would take to make sure your results were accurate.

(c) A singer wants to make one room in his house soundproof. This means that very little sound gets into or out of the room. How would the singer use the results of your experiment to decide which material to use?

EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 13
A girl sees the lightning in a thunderstorm 8 seconds before she hears the thunder. If sound travels at 340 m/s in the air, how far (in meters) away is the thunderstorm? 
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 14
A boy is standing 400 m away from a cliff. He makes a loud noise. If sound travels at 340 m/s, how long will it be before he hears the echo? 
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 8 - Sound>End of chapter review>Q 15
As you get older, your ears become worse at detecting high-pitched sounds. Suggest why.