KS3 Questions on Sound
Q2. Lee blew across the top of paper tubes to make sounds. He investigated how changing the length of a tube affects the pitch of the sound.
(a) What instrument could he use to measure the length of the tubes?
A metre rule 
1 mark
(b) The photograph below shows the different lengths of tubes Lee used. Suggest one way his test might not have been fair.
any one from
- tubes had different widths ( bores)
- he blew in different ways
- different thickness /type of paper
do not accept 'different lengths'
1 mark
(c) Lee made a prediction. Which of these statements is a prediction?
A |
The tubes were made of paper. |
B |
The pitch of the sound is how high or low it is. |
C |
The longer tube will make a lower sound. |
D |
The sound is caused by the vibration of air. |
1 mark
(d) Lee blew across the ends of 3 different lengths of tube and compared the pitch of the sound produced. His results are shown below.
Length of tube/cm |
Pitch of the sound |
5 |
high |
25 |
medium |
50 |
low |
Which length of tube made the sound with the highest pitch?
5 cm
1 mark
Maximum 4 marks
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