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CIE iGCSE Co-Ordinated Science P3.4 Sound Exam Style Questions Paper 1

CIE iGCSE Co-Ordinated Science P3.4 Sound Exam Style Questions Paper 1

Question

Which statement about sound is correct?
A An echo is produced by refraction of sound waves.
B The amplitude of a sound wave affects the pitch of a sound.
C The approximate range of audible frequencies for a human is 20 Hz–20kHz.
D Sound waves travel more quickly in a vacuum than in air.

▶️Answer/Explanation

Ans : C

Question

Two students conduct an experiment to determine the speed of sound in air.
They stand 639 m apart.
One student hits two blocks of wood together while the other uses a stop-watch to time how long
it takes for the sound to reach him.
It takes 1.80 s for the sound to reach the second student.
What is the speed of sound in air, calculated using these results?
(A)  330 m/s

(B)  355 m/s

(C)  710 m/s

(D)  1150 m/s

▶️Answer/Explanation

Ans : B

Question

The diagram is a displacement–time graph for the molecules in air as a sound wave passes.

The graphs below are drawn to the same scale.
Which graph represents a quieter sound with a higher pitch?

▶️Answer/Explanation

Ans : D

Question

A man stands 420 m away from a high wall. He bangs a drum once and starts a stop-watch at the
same time. When he hears an echo from the wall, the stop-watch reads 2.4 s.
What is the speed of sound, calculated from this information?
(A)  87.5 m / s     (B)  175 m / s     (C)  330 m / s     (D)  350 m / s

▶️Answer/Explanation

Ans : D

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