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Free CBSE - Class 9 Science - Sound worksheets

Sample Worksheets

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1.
What is sound and how is it produced?
2.
Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.
3.
Why is sound wave called a longitudinal wave?
4.
Which characteristic of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
5.
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen, why?
6.
A person has a hearing range from $20$ Hz to $20$ kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as $344$ m s$^{-1}$.
7.
Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.
8.
The frequency of a source of sound is $100$ Hz. How many times does it vibrate in a minute?
9.
Does sound follow the same laws of reflection as light does? Explain.
10.
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
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Top Tutors who teach CBSE - Class 9 Science Sound

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Ms. Aparupa is a wonderful teacher who is well-versed in all the topics she teaches. The way she explains a concept from a student's perspective is splendid. She is very patient, always being flexible with the timings. Also, she matches your pace, gives detailed notes, and always stops to ask questions in the middle of the chapter to assess the students' understanding. She gives practice questions. I love having her as my Chemistry teacher, especially at the crucial stage of the 10th boards. I will definitely be continuing classes with her next year!!!!

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superTutorSuper Tutor
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Vijay Sir's teaching style is effective and enjoyable. He uses real-world examples that make Grade 10 Maths and Science extremely relatable. I always look forward to his class.

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Bhavana W. Sound in Bhopal
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Decent communication skills with easy technique of study with 5 yrs of teaching experience.
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Rahul Verma Sound in Delhi
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Patient and knowledgeable teacher. Makes difficult maths topics simple and easy. Highly recommend!!!

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