Form 2 · Science

Sound Waves

Sains Tingkatan 2 · Gelombang Bunyi

Sound Waves is part of the Form 2 Science syllabus. Practice the MCQs here to sharpen your exam technique — each question comes with a worked explanation.

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Free sample questions

Sound Waves — sample Science questions with answers

Question 1
What is the S.I. unit of frequency?
- AHertz ( $H z$ )
- BMeter per second ( $m / s$ )
- CNewton ( $N$ )
- DDecibel ( $d B$ )
Answer: A. Hertz ($Hz$)
Frequency is measured in Hertz ( $H z$ ), which is the number of cycles per second.
Question 2
Sound waves are... waves
- Atransverse
- Blongitudinal
- Celectromagnetic
- Dstationary
Answer: B. longitudinal
Sound is a longitudinal wave because the particles of the medium vibrate parallel to the direction of propagation.
Question 3
The higher the amplitude of a sound wave, the...
- Alouder the sound
- Bhigher the pitch
- Clower the frequency
- Dshorter the wavelength
Answer: A. louder the sound
Amplitude is related to energy; a larger amplitude produces a louder sound.
Question 4
Sound cannot travel in...
- Aair
- Bwater
- Cvacuum
- Diron
Answer: C. vacuum
Sound requires a medium to travel; a vacuum has no particles.
Question 5
The frequency of sound that can be heard by humans is between...
- A $20 H z$ to $20000 H z$
- B $1 H z$ to $100 H z$
- C $200 H z$ to $2000 H z$
- D $0 H z$ to $200 H z$
Answer: A. $20\ Hz$ to $20000\ Hz$
The human hearing range is $20 H z$ to $20000 H z$ .

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