Physics Sound Quiz For 10th Grade

1. The word 'pitch' refers to how high or low a note sounds

True

False

the higher the frequency, the higher note we hear (higher pitched)

Explanation

the higher the frequency, the higher note we hear (higher pitched)

2. Which statement describes the amplitude?

Distance from middle line (average) to top of wave (crest)

The very top point of a wave

The very bottom point of a wave

The distance between two crests

The amplitude of a wave is defined as the distance from the middle line (average) to the top of the wave (crest). It represents the maximum displacement of a particle in the medium from its equilibrium position when a wave passes through it. The greater the amplitude, the more energy the wave carries.

Explanation

The amplitude of a wave is defined as the distance from the middle line (average) to the top of the wave (crest). It represents the maximum displacement of a particle in the medium from its equilibrium position when a wave passes through it. The greater the amplitude, the more energy the wave carries.

3. How do we hear sounds?

Air particles hit our eardrums

The energy of the wave penetrates our brain

The eardrum stays completely still

the vibration of the air particles is transferred to the eardrum, which transfers it to other parts of the ear, including tiny hairs that send electrical messages to the brain saying 'this is a high sound' or 'this is the note c minor'

Explanation

the vibration of the air particles is transferred to the eardrum, which transfers it to other parts of the ear, including tiny hairs that send electrical messages to the brain saying 'this is a high sound' or 'this is the note c minor'

4. Which wave has the shortest wavelength?

The high frequency wave (top)

The low frequency wave (bottom)

They both have the same wavelength

the greater the frequency (higher), the smaller the wavelength

Explanation

the greater the frequency (higher), the smaller the wavelength

5. We can hear sound waves coming out of a radio, but 'radio waves' are actually part of the electromagnetic spectrum that includes visible light.

True

False

This is why radio waves can travel through space like light - they don't need air particles like sound waves do

Explanation

This is why radio waves can travel through space like light - they don't need air particles like sound waves do

6. Match the following

waves with the same amplitude are

waves with the same frequency

wave with the highest frequency

the higher the frequency, the shorter the wavelength

Explanation

the higher the frequency, the shorter the wavelength

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7. Which sound wave has the greatest amplitude?

The bottom wave

The top wave

Both waves have the same amplitude

Amplitude is the distance from the average line down the middle of the wave to the top of a crest. The greater the amplitude, the louder the noise seems to our ears

Explanation

Amplitude is the distance from the average line down the middle of the wave to the top of a crest. The greater the amplitude, the louder the noise seems to our ears

8. Which sound wave has the longest wavelength?

The blue one (top)

The green one (middle)

The reddish one (bottom)

None of them

The bottom one only shows 1/2 a wavelength so the whole wavelength would be twice as long, much longer than those above

Explanation

The bottom one only shows 1/2 a wavelength so the whole wavelength would be twice as long, much longer than those above

9. Tick all the ones that are TRUE

Sound waves can travel through a vacuum (space)

Radio waves are sound waves

Radio waves are actually part of the electromagnetic spectrum (like light)

Sound can only travel through particles like air, rocks or water

The statement "radio waves are actually part of the electromagnetic spectrum (like light)" is true because radio waves are a type of electromagnetic radiation, just like light. The statement "sound can only travel through particles like air, rocks or water" is also true because sound waves require a medium to travel through, such as air, water, or solid objects. Sound cannot travel through a vacuum or empty space.

Explanation

The statement "radio waves are actually part of the electromagnetic spectrum (like light)" is true because radio waves are a type of electromagnetic radiation, just like light. The statement "sound can only travel through particles like air, rocks or water" is also true because sound waves require a medium to travel through, such as air, water, or solid objects. Sound cannot travel through a vacuum or empty space.

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10. Select all the statements that are TRUE

The top sound wave has a longer wavelength than the bottom

The bottom sound wave would be louder than the top one

The note (pitch) of the bottom wave would be higher than the top one

Both waves have the same frequency

The wavelength of a sound wave is inversely proportional to its frequency, so if the top sound wave has a longer wavelength than the bottom one, it means that the bottom wave has a higher frequency and therefore a higher pitch. The statement about the note (pitch) of the bottom wave being higher than the top one is true.

Explanation

The wavelength of a sound wave is inversely proportional to its frequency, so if the top sound wave has a longer wavelength than the bottom one, it means that the bottom wave has a higher frequency and therefore a higher pitch. The statement about the note (pitch) of the bottom wave being higher than the top one is true.

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