Sound and Sound Waves

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Questions and Answers

Why can't sound travel in a vacuum?

A vacuum absorbs all sound waves.
The frequency of sound waves is too high to exist in a vacuum.
The amplitude of sound waves is too low to be detected in a vacuum.
Sound waves require a medium to vibrate and propagate. (correct)

The loudness of a sound is determined by its frequency.

False (B)

What is the range of audible frequencies for humans, in Hertz?

20 Hz to 20,000 Hz

The part of the human ear that vibrates in response to sound waves is called the _______.

eardrum Signup and view all the answers

Match the following actions with the description of what happens to the sound wave:

Increase the amplitude = Increases the loudness Increase the frequency = Increases the pitch Decrease the amplitude = Decreases the loudness Decrease the frequency = Decreases the pitch Signup and view all the answers

Which of the following is NOT a typical effect of noise pollution on human health?

Improved sleep quality (C) Signup and view all the answers

Planting trees near residential areas can help reduce noise pollution.

True (A) Signup and view all the answers

Name one instrument that uses vibrating strings to create musical sounds.

guitar Signup and view all the answers

Sound is produced by _______ objects.

vibrating Signup and view all the answers

Why does lightning appear to be seen before thunder is heard, even though they occur simultaneously?

Light travels significantly faster than sound. (C) Signup and view all the answers

Flashcards

Sound Production

Sound is produced by vibrating objects or mediums.

Sound Propagation

Sound requires a medium, like air or water, to travel.