Explore Exams
Login Signup
Sign in Open App
CBSE Class 9  >  Class 9 Notes  >  Science   >  Worksheet: Sound

Worksheet: Sound

Q.1. Fill in the blanks
(i) Quality of sound depends on ________ .
(ii) The speed of sound in a solid is ________ than the speed of sound in air.
(iii) Sound is caused by _________.
(iv) Pitch of sound depends on ________.
(v) Sound cannot travel through _______.

Q.2. If 25 sound waves are produced per second, what is the frequency in hertz?
(a) 25 hertz
(b) 50 hertz
(c) 75 hertz
(d) 1/25 hertz

Q.3. Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?
(a) Stretched strings
(b) Stretched membranes
(c) Metal plates
(d) Air columns

Q.5. Frequency of ultrasonic sound wave is
(a) Greater than 20 HZ
(b) Greater than 20,000 HZ
(c) Greater than 2 HZ
(d) Greater than 2 MHZ

Q.6. Why are the ceilings of concert halls curved?

Q.7. What happens when sound travels in air?

Q.8. What is an echo? Name two areas of its application?

Q.9. What is SONAR? Write its working?

Q.10. How can ultrasound be used to detect the defect in metal block?

Q.11. Suppose you and your friend are on the moon. Will you be able to hear any sound produced by your friend?

Q.12. Sound requires a medium to travel? Justify experimentally.

Q.13. How does the sound produced by a vibrating object in a medium reach your ear?

Q.14. Why are sound waves called as mechanical waves?

Q.15. Explain how sound is produced by your school bell.

You can access the solutions to this worksheet here.

The document Worksheet: Sound is a part of the Class 9 Course Science Class 9.
All you need of Class 9 at this link: Class 9
Join Course for Free

FAQs on Worksheet: Sound

1. What is sound and how does it travel through different materials for Class 9 CBSE?
Ans. Sound is a form of mechanical energy that travels in waves through solids, liquids, and gases by causing particles to vibrate. It requires a medium and cannot travel through a vacuum. Sound travels fastest through solids, moderately through liquids, and slowest through gases, as particle density varies across mediums.
2. How do frequency and wavelength affect the pitch and loudness of sound?
Ans. Frequency determines pitch-higher frequency creates higher pitch, while lower frequency produces lower pitch. Wavelength and frequency are inversely related. Loudness depends on amplitude: larger amplitudes create louder sounds, measured in decibels. These properties are fundamental to understanding sound wave characteristics in Class 9 physics.
3. Why can't sound travel in space and what's the difference between sound and light waves?
Ans. Sound requires a physical medium (solid, liquid, or gas) to propagate because it travels via particle vibration; space is a vacuum with no particles. Light waves are electromagnetic and travel without a medium. This fundamental difference explains why astronauts need radios in space but can see distant stars without interference.
4. What causes echo and reverberation, and how are they different in everyday life?
Ans. Echo occurs when sound reflects off a distant surface and returns as a distinct, separate sound with a time delay. Reverberation happens when multiple reflected sound waves overlap quickly, creating a lingering effect without clear separation. Room size and surface materials determine which phenomenon dominates-large spaces produce echoes; small rooms create reverberation.
5. How do the speed of sound and SONAR technology relate to solving real-world problems?
Ans. Sound travels at approximately 343 m/s in air at room temperature and faster in denser mediums. SONAR (Sound Navigation and Ranging) uses this principle to detect underwater objects by measuring sound wave reflection time. This application demonstrates how understanding sound wave behaviour enables navigation, depth measurement, and object detection in marine environments.
About this Document
6.2K Views
4.89/5 Rating
Apr 17, 2026 Last updated
Related Exams
Document Description: Worksheet: Sound for Class 9 2026 is part of Science Class 9 preparation. The notes and questions for Worksheet: Sound have been prepared according to the Class 9 exam syllabus. Information about Worksheet: Sound covers topics like and Worksheet: Sound Example, for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Worksheet: Sound.
Introduction of Worksheet: Sound in English is available as part of our Science Class 9 for Class 9 & Worksheet: Sound in Hindi for Science Class 9 course. Download more important topics related with notes, lectures and mock test series for Class 9 Exam by signing up for free. Class 9: Worksheet: Sound
Description
Worksheet: Sound of Science Class 9 - variety of important questions with solutions, helping you prepare for exam. Download free PDF from EduRev.
Information about Worksheet: Sound
In this doc you can find the meaning of Worksheet: Sound defined & explained in the simplest way possible. Besides explaining types of Worksheet: Sound theory, EduRev gives you an ample number of questions to practice Worksheet: Sound tests, examples and also practice Class 9 tests
Explore Courses for Class 9 exam
Get EduRev Notes directly in your Google search
Related Searches
Objective type Questions, video lectures, Worksheet: Sound, Worksheet: Sound, Important questions, Free, Summary, MCQs, pdf , study material, Previous Year Questions with Solutions, mock tests for examination, Worksheet: Sound, practice quizzes, past year papers, Extra Questions, shortcuts and tricks, ppt, Sample Paper, Semester Notes, Exam, Viva Questions;
;
Additional Information about Worksheet: Sound for Class 9 Preparation

Worksheet: Sound Free PDF Download

The Worksheet: Sound is an invaluable resource that delves deep into the core of the Class 9 exam. These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective. With the help of these notes, you can grasp complex subjects quickly, revise important points easily, and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner, allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material, or toppers' notes, this PDF has got you covered. Download the Worksheet: Sound now and kickstart your journey towards success in the Class 9 exam.

Importance of Worksheet: Sound

The importance of Worksheet: Sound cannot be overstated, especially for Class 9 aspirants. This document holds the key to success in the Class 9 exam. It offers a detailed understanding of the concept, providing invaluable insights into the topic. By knowing the concepts well in advance, students can plan their preparation effectively. Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.

Worksheet: Sound Notes

Worksheet: Sound Notes offer in-depth insights into the specific topic to help you master it with ease. This comprehensive document covers all aspects related to Worksheet: Sound. It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation. Practice papers and question papers enable you to assess your progress effectively. Additionally, the paper analysis provides valuable tips for tackling the exam strategically. Access to Toppers' notes gives you an edge in understanding complex concepts. Whether you're a beginner or aiming for advanced proficiency, Worksheet: Sound Notes on EduRev are your ultimate resource for success.

Worksheet: Sound Class 9 Questions

The "Worksheet: Sound Class 9 Questions" guide is a valuable resource for all aspiring students preparing for the Class 9 exam. It focuses on providing a wide range of practice questions to help students gauge their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation. The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level. Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.

Study Worksheet: Sound on the App

Students of Class 9 can study Worksheet: Sound alongwith tests & analysis from the EduRev app, which will help them while preparing for their exam. Apart from the Worksheet: Sound, students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc. The EduRev App will make your learning easier as you can access it from anywhere you want. The content of Worksheet: Sound is prepared as per the latest Class 9 syllabus.
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup