• Written By Abhishek_verma

# NCERT Solutions for Class 9 Science Chapter 12 Sound

NCERT Solutions for Class 9 Science Chapter 12 Sound: NCERT Solutions go a long way in helping students learn and practice the topics covered in Class 9 Science Chapter 12 Sound. In this article, we have provided the NCERT Solutions of this chapter in PDF format to help students with detailed solutions for in-text questions.

The solutions will help students clear the various concepts covered in the chapter. The in-text and exercise questions are solved in a step-by-step manner as per the latest guidelines. Embibe also offers access to over 2630 questions from 73 different books to help students get additional practice for their exams. Scroll down for all the details pertaining to NCERT Solutions for Class 9 Science Chapter 12 Sound.

## NCERT Solutions for Class 9 Science Chapter 12: Important Topics

In this chapter, the various concepts related to sound are explained with the help of practical activities, examples, and diagrams. Students will learn how sound is produced followed by the propagation of sound. They will also learn two most important aspects with respect to the transmission of sound – sound needs a medium to travel and sound waves are longitudinal waves. The chapter also covers important characteristics of sound waves (frequency, amplitude, and speed) and the speed of sound in different mediums.

Other concepts like the reflection of sound, echo, reverberation, etc. will be explained. Practical applications, like uses of multiple reflections of sound, application of ultrasound, SONAR, etc. will also be discussed.

We have also provided the list of important topics covered in NCERT Class 9 Science Chapter 12 in the table below for students to refer to:

### NCERT Solutions for Class 9 Science Chapter 12: Points To Remember

We have provided some important points that are covered in NCERT Class 9 Science Chapter 12 to help students in their exam preparations. Refer to the list below:

• Sound is mechanical energy which produces the sensation of hearing.
• For hearing sound, there must be (a) a vibrating body, (b) a material medium for its propagation, and (c) a receiver, such as the human ear.
• Sound energy does not propagate through a vacuum.
• When the particles of a medium oscillate in the same direction, in which wave is being propagated, such a wave is called a longitudinal wave.
• While the transverse wave is being propagated in a medium, the particles of the medium oscillate at right angles to the direction of wave propagation.
• Transverse waves can be produced in solids and liquids, but not in gases.
• For a transverse wave, the highest point on the elevation or hump is called the crest, whereas the lowest point on the depression or the hollow is called a trough.
• Compression is a region in a longitudinal wave, where the particles of the medium are crowded together. It is a region of high pressure and high density.
• Rarefaction is a region in a longitudinal wave, where the particles of the medium are spread wide apart. It is a region of low pressure and low density.

Students can check all the important points to remember from NCERT Class 9 Science Chapter 12 Sound on Embibe for.

## NCERT Solutions for Class 9 Science: All Chapters

Students can download the NCERT Solutions for Class 9 Science from the following:

## FAQs on NCERT Solutions for Class 9 Science Chapter 12

Q.1: How can students score good marks in CBSE Class 9 Science?

Ans: Class 9 plays a fundamental role in further studies. The only key to score good marks in the CBSE Class 9 Science exam is via consistent practice.

Q.2: How can one prepare for the Class 9 Science Sound chapter?

Ans: The class 9 Sound chapter covers all the topics of sound and its applications in brief. To get better at the topics and eventually score good marks, students should read the chapter thoroughly from the NCERT book. Then they must try to solve the questions on their own. If they get stuck in between, they can refer to the NCERT Solutions for Class 9 Science Chapter 12.

Q.3: What are the study tips for the Class 9 Science Exam?

Ans: Some of the tips to score good marks in the Class 9 Science exam are as follows:
-Prepare an adequate plan and timetable to study
-Concentrate on the basic concepts and try working on weaker areas.
-Give adequate time to each of the concepts.
-Practice regularly to score well.

Q.4: Where can I find the NCERT Solutions for Class 9 Science?

Ans: You can find the NCERT Solutions for Class 9 Science at Embibe. Students can view the NCERT solutions by Embibe online as well as download the same through the link mentioned above.

Q.5: How can I practice Class 9 Science from NCERT Solutions?

Ans: Students are advised first to develop conceptual clarity in all topics and solve the in-text questions with the help of NCERT solutions to learn how to write answers effectively.