NCERT Solutions for Class 9 Science Chapter 12: Sound - Embibe
  • Written By Abhishek_verma
  • Last Modified 03-08-2022
  • Written By Abhishek_verma
  • Last Modified 03-08-2022

NCERT Solutions for Class 9 Science Chapter 12

NCERT Solutions for Class 9 Science Chapter 12: Students preparing for their final exam in CBSE Class 9 should have access to appropriate learning material in order to excel. NCERT Solutions go a long way in helping them learn and practice the topics covered in Science Chapter 12 of Class 9. In this article, we have provided the NCERT Solutions for Class 9 Science chapter 12 in PDF format so that students have all the important study material ready while solving the 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 CBSE guidelines. We have also provided preparation tips and important questions. Scroll down for chapter description, and important questions on Class 9 Science Chapter Sound.

NCERT Solutions for Class 9 Science Chapter 12: Overview

Chapter 12 Sound deals with various aspects of sound. Before getting into the detailed NCERT solutions for Class 9 Science Chapter 12, let us have an overview of the topics in this chapter:

SectionTopic Name
12.1Production of Sound
12.2Propagation of Sound
12.2.1Sound Needs A Medium To Travel
12.2.2Sound Waves Are Longitudinal Waves
12.2.3Characteristics of Sound Wave
12.2.4Speed of Sound In Different Media
12.3Reflection of Sound
12.3.1Echo
12.3.2Reverberation
12.3.3Use of Multiple Reflection of Sound
12.4Range of Hearing
12.5Applications of Ultrasound
12.5.1SONAR
12.6Structure of Human Ear

NCERT Solutions Class 9 Science Chapter 12: Free PDF

The CBSE Class 9 Science Chapter 12 Solutions by Embibe are given below. Students can view these online as well as download the same from the given links. All the questions have been solved with clear explanations along with diagrams wherever required.

Embibe’s NCERT Solutions for Class 9 Science Chapter 12 are 100% accurate and will help students in preparing for their exams:

NCERT Solutions for Class 9 Science Chapter 12: Solved In-text Questions

Q.1. What is sound and how is it produced? 
Solution:
A sound is a form of energy which produces the sensation of hearing in our ears. In other words, sounds are vibrations that travel through a medium in the form of an audible mechanical wave. Sound is produced by a vibrating body. When a body vibrates, it causes the surrounding medium also to vibrate. These vibrations travel as longitudinal waves.

Q.2. Does sound follow the same laws of reflection as light does? Explain. 
Solution:
The sound bounces off a solid or liquid. Like light, the sound gets reflected at the surface of a solid or liquid and follows the same laws of reflection.
The laws of reflection of sound are as follows:

  • The direction in which the sound is incident and is reflected makes equal angles with the normal to the reflecting surface at the point of incidence.
  • The incident wave, reflected wave and normal at the point of incidence are in the same plane.

Download NCERT Solutions for Class 9 Science Chapter 12

NCERT Solutions for Class 9 Science Sound: Chapter Description

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.

Important Questions on CBSE Class 9 Science Chapter 12 Sound

Here we have provided some of the important questions that will help students in their exam preparation.

  • What is Sound?
  • Give 5 applications of sound.
  • What is Sonar?
  • The echo-receiver of a sonar attached to a ship receives the echo from the bottom of the sea 4 seconds after the ultrasonic waves were sent into the sea. Find the depth of the sea. If the speed of sound in water is 1500 m/s.
  • What is the difference between Audible and Inaudible Sound?
  • Define Ultrasound and list its applications.
  • Draw the Human ear and label all parts.
  • An echo returned in 3 seconds. What is the distance of the reflecting surface from the source, given that the speed of sound is 342m/sec?
  • What is the effect of the speed of sound in the air on increasing the temperature?
  • What is the unit used to measure the loudness of sound?
NCERT Solutions for Class 9 Science Chapter 11NCERT Solutions for Class 9 Science Chapter 13NCERT Solutions for Class 9 Science (All Chapters)

Embibe provides you with the NCERT Solutions for Class 9 Science Chapter 12 which includes questions and their answers. Now that we have provided the study material, NCERT solutions, important questions, as well as preparation tips, it is time for all students to kickstart their preparation for the final exam of CBSE Class 9 Science.

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.

Take Free Mock Tests for NCERT Class 9 Science on Embibe