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KS3 Questions on Sound

Q8. The diagram below shows part of the human ear.

We can hear somebody speaking because sound waves enter our ears.

(a)

(i) What do our eardrums do when sound waves reach them?

1 mark

(ii) Sometimes a lot of wax is produced in the ear. The wax rests against the eardrum, as shown above. Give one reason why we cannot hear very well when our ears contain a lot of wax.

1 mark

(b) The table below shows the lowest and highest frequencies that five living things can hear.

living thing
lowest frequency (Hz)
highest frequency (Hz)
human
20
20 000
sparrow
300
20 000
dog
20
45 000
cat
20
64 000
rabbit
300
42 000

 

(i) Which three living things from the table cannot hear a frequency of 43 000 Hz?

1 mark

(ii) From the table, choose the living thing that can hear the biggest range of frequencies.

1 mark

maximum 4 marks