Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8th
Advertisement Remove all ads

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide chapter 6 - Sound [Latest edition]

Chapters

Class 8th Science Answers Guide - Shaalaa.com
Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

Chapter 6: Sound

Exercise
Advertisement Remove all ads
Exercise [Page 69]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 69]

Choose the best answer.

Exercise | Q I. 1. | Page 69

Sound waves travel very fast in

  • air

  • metals

  • vacuum

  • liquids

Exercise | Q I. 2. | Page 69

Which of the following are the characteristics of vibrations?

  1. Frequency
  2. Time period
  3. Pitch
  4. Loudness
  • i and ii

  • ii and iii

  • iii and iv

  • i and iv

Exercise | Q I. 3. | Page 69

The amplitude of the sound wave decides its

  • speed

  • pitch

  • loudness

  • frequency

Exercise | Q I. 4. | Page 69

What kind of musical instrument is a sitar?

  • String instrument

  • Percussion instrument

  • Wind instrument

  • None of these

Exercise | Q I. 5. | Page 69

Find the odd one out.

  • Harmonium

  • Flute

  • Nadaswaram

  • Violin

Exercise | Q I. 6. | Page 69

Noise is produced by

  • vibrations with high frequency.

  • regular vibrations.

  • regular and periodic vibrations.

  • irregular and non-periodic vibrations.

Exercise | Q I. 7. | Page 69

The range of audible frequency for the human ear is

  • 2 Hz to 2000 Hz

  • 20 Hz to 2000 Hz

  • 20 Hz to 20000 Hz

  • 20 Hz to 20000 Hz

Exercise | Q I. 8. | Page 69

If the amplitude and frequency of a sound wave are increased, which of the following is true?

  • Loudness increases and pitch is higher

  • Loudness increases and pitch is unchanged.

  • Loudness increases and pitch is lower

  • Loudness decreases and pitch is lower.

Exercise | Q I. 9. | Page 69

Which of the following may be caused by noise?

  • Irratition

  • Stress

  • Nervousness

  • All the above

Exercise [Page 69]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 69]

Fill in the blanks.

Exercise | Q II. 1. | Page 69

Sound is produced by ______.

Exercise | Q II. 2. | Page 69

The vibrations of a simple pendulum are also known as _______.

Exercise | Q II. 3. | Page 69

Sound travels in the form of ______.

Exercise | Q II. 4. | Page 69

High-frequency sounds that cannot be heard by you are called _______.

Exercise | Q II. 5. | Page 69

Fill in the blank.

The pitch of a sound depends on its ________.

Exercise | Q II. 6. | Page 69

If the thickness of a vibrating string is increased, its pitch _____.

Exercise [Page 69]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 69]

Exercise | Q III. | Page 69

Match the following.

Ultrasonics Frequency below 20Hz
Speed of sound in air Needs material medium
Infrasonics 330ms-1
Sound propagation Frequency more than 20000 Hz
Exercise [Page 70]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 70]

Exercise | Q IV. 1. | Page 70

Consider the statement given below and choose the correct option.

Assertion: When lightning strikes, the sound is heard a little after the flash is seen.

Reason: The velocity of light is greater than that of the sound.

  • Both assertion and reason are true and the reason is the correct explanation of assertion.

  • Both assertion and reason are true but reason is not the correct explanation of assertion.

  • Assertion is true but reason is false.

  • Assertion is false but reason is true.

  • Both Assertion and reason are false.

Exercise | Q IV. 2. | Page 70

Consider the statement given below and choose the correct option.

Assertion: Two persons on the surface of the moon cannot talk to each other.

Reason: There is no atmosphere on the moon.

  • Both assertion and reason are true and the reason is the correct explanation of assertion.

  • Both assertion and reason are true but reason is not the correct explanation of assertion.

  • Assertion is true but reason is false.

  • Assertion is false but reason is true.

  • Both Assertion and reason are false.

Exercise [Page 70]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 70]

Answer briefly.

Exercise | Q V. 1. | Page 70

What is vibration?

Exercise | Q V. 2. | Page 70

Give an example to show that light travels faster than sound?

Exercise | Q V. 3. | Page 70

To increase loudness of sound by four times, how much should the amplitude of vibration be changed?

Exercise | Q V. 4. | Page 70

What is an ultrasonic sound?

Exercise | Q V. 5. | Page 70
Distinguish between music and noise.
Exercise | Q V. 6. | Page 70

What are the hazards of noise pollution?

Exercise | Q V. 7. | Page 70

Mention a few measures to be taken to reduce the effect of noise pollution.

Exercise | Q V. 8. a. | Page 70

Define the following term.
Amplitude

Exercise | Q V. 8. b. | Page 70

Define the following term.
Loudness

Exercise | Q V. 9. | Page 70

How does planting trees help in reducing noise pollution?

Exercise [Page 70]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 70]

Answer in detail.

Exercise | Q VI. 1. | Page 70

Describe an experiment to show that sound cannot travel through vaccum.

Exercise | Q VI. 2. | Page 70

What are the properties of sound?

Exercise | Q VI. 3. | Page 70

What steps should be taken to reduce the effect of noise pollution?

Exercise | Q VI. 4. | Page 70

Describe the structure and function of the human ear?

Exercise [Page 70]

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide Chapter 6 SoundExercise [Page 70]

Problems.

Exercise | Q VII. 1. | Page 70

Ruthvik and Ruha hear a gunshot 2 second after it is fired. How far away from the gun they are standing? (Speed of sound in air is equal to 330ms-1)

Exercise | Q VII. 2. | Page 70

A sound wave travels 2000 m in 8 s. What is the velocity of the sound?

Exercise | Q VII. 3. | Page 70

A wave with a frequency of 500 Hz is traveling at a speed of 200 ms-1. What is the wavelength?

Chapter 6: Sound

Exercise
Class 8th Science Answers Guide - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide chapter 6 - Sound

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Science Answers Guide chapter 6 (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 Tamil Nadu Board of Secondary Education Class 8th Science Answers Guide 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. Tamil Nadu Board Samacheer Kalvi textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8th Science Answers Guide chapter 6 Sound are Sound, Production of Sound, Characteristics of a Sound Wave, Noise Pollution, Hearing Loss, Propagation of Sound, Properties of Sounds, Loudness and Intensity, Pitch (or shrillness) and frequency, Quality (Or Timbre) and Wave Form, Audibility and Range, Musical Instruments, Sound Produced by Humans, Human Ear.

Using Tamil Nadu Board Samacheer Kalvi Class 8th 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 Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 8th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

Get the free view of chapter 6 Sound Class 8th extra questions for Class 8th Science Answers Guide and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×