Is this Class 9 Science worksheet on Sound free?

Yes — it is completely free, with no login and no ads. You can print it or save it as a PDF, and generate unlimited variations.

Does the Sound worksheet come with answers?

Yes. Every worksheet has a separate answer key with the correct answers, short explanations and marks, so it is ready for marking.

Can I choose how many questions and which types?

Yes. Open the generator for this chapter and set how many MCQs, short, long and HOTS questions you want; totals and marks update live, and you can swap any single question.

Which board and class is this for?

This worksheet is aligned to CBSE Class 9 Science, chapter “Sound”.

🧾 CBSE · Class 9

Class 9 Science: Sound Worksheet (with Answers)

A free, print-ready worksheet on Sound for CBSE Class 9 Science, with a matching answer key. Use the sample below, or build your own with the exact mix of questions you need — no login, no ads.

Generate your own worksheet for this chapter →Read the chapter notes

Sample worksheet

7 of 18 questions from this chapter. Generate your own for the full set, more variations, and a clean print layout.

1. Sound is produced by:
- (a) vibrating objects
- (b) heating
- (c) still objects
- (d) lightning only
2. Sound cannot travel through a:
- (a) solid
- (b) gas
- (c) vacuum
- (d) liquid
3. Sound waves are:
- (a) electromagnetic
- (b) longitudinal
- (c) transverse
- (d) stationary only
4. The wave equation is:
- (a) v = f + λ
- (b) v = fλ
- (c) v = f/λ
- (d) v = λ/f
5. Why is sound called a mechanical wave?
6. What is reverberation?
7. Explain the formation of an echo and the condition required to hear it.

View answers

1. (a) vibrating objects — Vibrating objects produce sound.
2. (c) vacuum — A vacuum has no particles to carry sound.
3. (b) longitudinal — Sound travels as a longitudinal wave.
4. (b) v = fλ — Speed = frequency × wavelength.
5. Because it needs a material medium to travel and cannot pass through a vacuum.
6. The persistence of sound caused by repeated reflections in an enclosed space.
7. An echo is heard when sound reflects off a distant surface and returns to the listener. Because the sensation of sound persists for about 0.1 s, the reflected sound must arrive at least 0.1 s after the original. In air (speed ≈ 344 m/s), this needs the reflecting surface to be at least about 17 m away.

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How it works

Every question is drawn from StudyMatic’s own Science bank for Sound — nothing is auto-generated or invented. Pick how many of each type you want, add your own questions if you like, choose 1–4 paper sets for anti-cheating, and print the worksheet and answer key separately or save them as PDF.

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FAQ

Is this Class 9 Science worksheet on Sound free?: Yes — it is completely free, with no login and no ads. You can print it or save it as a PDF, and generate unlimited variations.
Does the Sound worksheet come with answers?: Yes. Every worksheet has a separate answer key with the correct answers, short explanations and marks, so it is ready for marking.
Can I choose how many questions and which types?: Yes. Open the generator for this chapter and set how many MCQs, short, long and HOTS questions you want; totals and marks update live, and you can swap any single question.
Which board and class is this for?: This worksheet is aligned to CBSE Class 9 Science, chapter “Sound”.