Sound Practice Questions
Class 8 · Science · 1130 free MCQs with instant results and detailed explanations.
1130
Total
351
Easy
568
Medium
211
Hard
Start Practicing Sound
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Topics in Sound
Vibration
279
Noise Pollution
327
Amplitude and Frequency
268
Sound Propagation
256
Sample Questions from Sound
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary cause of sound production?
A.
Vibration of objects
B.
Electric current
C.
Light waves
D.
Magnetic fields
Show Answer & Explanation
Correct Answer: A
Sound is produced when an object vibrates, creating pressure waves in the surrounding medium.
Q2
Easy
Which part of the ear is primarily responsible for detecting vibrations in the air?
A.
Eardrum
B.
Ossicles
C.
Cochlea
D.
Auditory nerve
Show Answer & Explanation
Correct Answer: A
The eardrum vibrates in response to sound waves, which then transmits the vibrations to the inner ear.
Q3
Easy
What happens to the pitch of a sound when the frequency of vibration increases?
A.
The pitch decreases
B.
The pitch increases
C.
The pitch remains the same
D.
The sound disappears
Show Answer & Explanation
Correct Answer: B
Higher frequency vibrations produce higher pitches, while lower frequencies produce lower pitches.
Q4
Medium
What is the primary cause of sound production in musical instruments?
A.
Vibration of strings or air columns
B.
Chemical reactions
C.
Magnetic fields
D.
Electric currents
Show Answer & Explanation
Correct Answer: A
Musical instruments produce sound primarily through the vibration of strings or air columns, which creates sound waves.
Q5
Medium
Which of the following statements about sound vibrations is true?
A.
Sound travels faster in solids than in gases.
B.
Sound requires a medium to travel.
C.
Sound can travel through a vacuum.
D.
Sound is a form of electromagnetic energy.
Show Answer & Explanation
Correct Answer: B
Sound requires a medium (solid, liquid, or gas) to propagate, as it travels through the vibrations of particles.
Q6
Medium
Which factor does NOT affect the pitch of a vibrating string?
A.
Length of the string
B.
Tension of the string
C.
Thickness of the string
D.
Color of the string
Show Answer & Explanation
Correct Answer: D
The color of the string does not influence the pitch; pitch is affected by length, tension, and thickness.
Q7
Medium
In which of the following scenarios would sound travel fastest?
A.
Through air
B.
Through water
C.
Through steel
D.
Through helium gas
Show Answer & Explanation
Correct Answer: C
Sound travels fastest through solids, with steel being denser and more elastic than the other mediums listed.
Q8
Hard
Which of the following statements correctly describes how sound travels through different mediums?
A.
Sound travels fastest through solids because particles are closer together.
B.
Sound travels fastest through gases due to high energy of gas particles.
C.
Sound cannot travel through liquids at all.
D.
Sound travels equally fast through all mediums.
Show Answer & Explanation
Correct Answer: A
Sound travels fastest through solids due to the close proximity of particles which facilitate quicker vibrations.
Q9
Hard
When you tighten a guitar string, what effect does it have on the sound produced?
A.
Decreases frequency and increases pitch.
B.
Increases frequency and increases pitch.
C.
Decreases amplitude and increases loudness.
D.
No effect on sound frequency.
Show Answer & Explanation
Correct Answer: B
Tightening the string increases its tension, which raises its frequency and, consequently, the pitch of the sound produced.
Q10
Hard
What property of sound is primarily affected by the amplitude of a sound wave?
A.
Frequency
B.
Pitch
C.
Loudness
D.
Quality
Show Answer & Explanation
Correct Answer: C
Amplitude is directly related to loudness; higher amplitude results in louder sounds.
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Other Class 8 Subjects
Sound — Class 8 Science Practice Questions Online
This page contains 1130 practice MCQs for the chapter Sound in Class 8 Science. The questions are organized by difficulty — 351 easy, 568 medium, 211 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.