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Sound G-8 Worksheet

The document is a mark scheme for a set of questions related to sound and its properties, including speed, frequency, amplitude, and human hearing range. It outlines the correct answers and the corresponding marks for each question, totaling 39 marks. Key concepts include the differences between sound in various mediums, the characteristics of sound waves, and the range of human hearing.

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Sanjeev N
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18 views4 pages

Sound G-8 Worksheet

The document is a mark scheme for a set of questions related to sound and its properties, including speed, frequency, amplitude, and human hearing range. It outlines the correct answers and the corresponding marks for each question, totaling 39 marks. Key concepts include the differences between sound in various mediums, the characteristics of sound waves, and the range of human hearing.

Uploaded by

Sanjeev N
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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- Mark Scheme /

Question Answer Marks AO Element Notes Guidance

1 1000 m / s ≤ value ≤ 2000 m / s 1

2 molecules closer together / water 1


has greater density

3 20 to 20 000 (1) 2
Hz or hertz (1)

4 (note B has) smaller amplitude 2


OR
note A has larger amplitude
(1)
(note B has) lower frequency OR
longer wavelength OR
note A has higher frequency OR
shorter wavelength (1)

5 molecules closer together than 3


normal in a compression (1)
molecules further apart than
normal in a rarefaction (1)
pressure higher (than normal) in
a compression AND pressure
lower (than normal) in a
rarefaction (1)

6 > 20 000 Hz 1
- Mark Scheme /

Question Answer Marks AO Element Notes Guidance

7 1500 m / s 1

8 frequency (of sound) OR 2


25 kHz (1)
is above (upper limit of) human
hearing range OR
is an ultrasound (1)

9 (it is) vibrating 1

10 sound travels faster in 1


steel/metal/solid/the rail (than in
air)

rd
11 3 box: increasing the amplitude 1
of a sound wave increases its
loudness

rd
12 3 box: sound travels slower 1
than the speed of light

13 circle around 20 Hz—20 000 1


Hz

14 quieter sound AND has lower 3


pitch (1)
(as) smaller amplitude (1)
(as) frequency is lower (1)
- Mark Scheme /

Question Answer Marks AO Element Notes Guidance

15 line drawn with smaller 2


amplitude (1)
lower frequency i.e. fewer waves
on screen (1)

16(a) vibrates 1

16(b) yes (1) 2


(as within audible range of)
20 Hz to 20 000 Hz (1)

nd
17 2 box: healthy human ears can 1
hear sounds in the range 20 Hz
to 20 000 Hz

18(a) C marked within the shortest 1


gap

18(b) R marked within longest gap 1

18(c) double-headed arrow across 1


two wavelengths

19 vibrates 1

20 vacuum 1

21(a) 1000 (Hz) 1


- Mark Scheme /

Question Answer Marks AO Element Notes Guidance

21(b) frequency in range 10 001 to 1


30 000 (Hz)

21(c) lowest frequency heard by 2


humans is 20 Hz (1)
(but) elephants can hear
frequencies below 20 Hz (1)

21(d) ultrasound 1

22 amplitude 1

23 pitch 1

[Total: 39]

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