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Balbharati solutions for Class 8 Science chapter 15 - Sound

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Chapters

Balbharati Balbharati Class 8 Science - General Science

Balbharati Class 8 Science - General Science - Shaalaa.com

Chapter 15: Sound

Exercise

Chapter 15: Sound Exercise Exercise solutions [Page 109]

Exercise | Q 1.1 | Page 109

Fill in the blanks with approriate word:

The region in a sound wave,  with higher pressure and density is called ________ and that with low pressure and density is called _________ .

Exercise | Q 1.2 | Page 109

Fill in the blanks with approriate word:

Medium is ___________ for generation of sound.

Exercise | Q 1.3 | Page 109

Fill in the blanks with approriate word:

The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is __________.

Exercise | Q 1.4 | Page 109

Fill in the blanks with approriate word:

Different sound notes have different ____________.

Exercise | Q 1.5 | Page 109

Fill in the blanks with approriate word:

In loudspeaker ________ energy is converted into ________ energy.

Exercise | Q 2.1 | Page 109

Give scientifcic reasons:

It is essential to change the tension on the vocal cords, as we produce different sound notes from our larynx.

Exercise | Q 2.2 | Page 109

Give scientifcic reasons:

Astronauts on the moon can not hear each other directly.

Exercise | Q 2.3 | Page 109

Give scientifcic reasons:

As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.

Exercise | Q 3 | Page 109

How are differnt sound notes generated in musical instruments like guitar, which uses strings for sound generation, and flute, which uses blown air for sound generation ?

Exercise | Q 4 | Page 109

How is sound produced in a human larynx and a loudspeaker?

Exercise | Q 5 | Page 109

Explain the experiment, with neat diagram, to prove the following:
'Sound needs material medium for propagation.'

Exercise | Q 6 | Page 109

Match the following

 Human larynx  Vibrations of metal arms
 Loudspeaker  Vibrations in air column
 Jal-tarang  Vibraions in vocal cords
 Tuning fork  Vibrations in strings
 Sitar  Vibrations of screen 

Chapter 15: Sound

Exercise

Balbharati Balbharati Class 8 Science - General Science

Balbharati Class 8 Science - General Science - Shaalaa.com

Balbharati solutions for Class 8 Science chapter 15 - Sound

Balbharati solutions for Class 8 chapter 15 (Sound) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Balbharati Class 8 Science - General Science solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8 Science chapter 15 Sound are Production of Sound, Propagation of Sound and Medium, Frequency of Sound Waves, Sound and Music, Sound Produced by Humans, Sound Generation by Loudspeaker.

Using Balbharati Class 8 solutions Sound exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board Class 8 prefer Balbharati Textbook Solutions to score more in exam.

Get the free view of chapter 15 Sound Class 8 extra questions for and can use Shaalaa.com to keep it handy for your exam preparation

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