Class 8 Exam > Class 8 Notes > Science Class 8 > Long Answer Questions - Sound
Class 8 Science Chapter 11 Question Answers - Sound
Long Answer Question,
Q1: Explain the mechanism of hearing in human body.
Ans: Sound plays an important role in our life; Sound helps us to communicate with one another.Sound is so important because animals are able to hear events all around them, no matter where their attention is focused or not. The eardrum, or tympanic membrane, is a thin, cone-shaped membrane that separates the external ear from the middle ear in humans, it is like a stretched rubber sheet, sound vibrations make the eardrum vibrate. The ear drum sends vibration to the inner ear and from there signal is send to the brain and in this way we are able to hear the sounds around us.
Q2: “Sound travels through a medium, it cannot travel in vacuum”. Justify the statement.
Ans: Sound travels through a medium solid, liquid and gas. It cannot travel through vacuum.Fill a bucket with water and shake a bell under the water with one hand make sure that the bell should not touch the body of the bucket. Now place your ear gently on the water surface, you will hear the sound of the ringing bell, thus we can say that sound can travel through water.Take a metal rod and hold its one end to your ear, ask your friend to tap at the other end of metal rod you will hear the sound of tapping, thus this proves that sound can travels through solid.
Q3: A pendulum oscillates 50 times in 6 seconds. Find its time period and frequency.
Ans: Frequency of oscillation is defined as the number of oscillation of a vibrating body per second. it is given by
Frequency = no of oscillation/ time period = 50/6 = 8.33 Hz
Time period =1/frequency of oscillation = 1/ 8.33 = 0.12 seconds.
Q4: The sound from a butterfly is produced when it vibrates its wings at an average rate of 400 vibrations per second. What is the time period of vibration?
Ans: Time period =1/frequency of oscillation = 1/ 400 0.0025 seconds
The document Class 8 Science Chapter 11 Question Answers - Sound is a part of the Class 8 Course Science Class 8.
All you need of Class 8 at this link: Class 8
|
91 videos|273 docs|44 tests
|
FAQs on Class 8 Science Chapter 11 Question Answers - Sound
| 1. What is sound and how is it produced? |  |
Ans. Sound is a form of energy that is produced by vibrating objects. It is created when an object vibrates, causing the particles around it to vibrate as well. These vibrations then travel through a medium, such as air, and reach our ears, allowing us to hear the sound.
| 2. What are the different types of sounds? | |
Ans. There are two main types of sounds: audible sounds and inaudible sounds. Audible sounds are the sounds that can be heard by the human ear, while inaudible sounds are the sounds that cannot be heard by the human ear, such as ultrasonic or infrasonic sounds.
| 3. How does sound travel through different mediums? | |
Ans. Sound travels through different mediums by causing the particles in the medium to vibrate. In solids, sound travels through the particles that are closely packed together, allowing the vibrations to easily pass from one particle to another. In liquids, sound travels by causing the particles to vibrate and pass on the vibrations to neighboring particles. In gases, sound travels by causing the particles to compress and rarefy, creating areas of high and low pressure that propagate as sound waves.
| 4. How does the pitch of a sound depend on its frequency? | |
Ans. The pitch of a sound is determined by its frequency. Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. For example, a sound with a high frequency, such as a whistle, will have a high pitch, while a sound with a low frequency, such as a bass guitar, will have a low pitch.
| 5. How does the loudness of a sound depend on its amplitude? | |
Ans. The loudness of a sound is determined by its amplitude. Amplitude refers to the maximum displacement of the particles in a sound wave. A sound with a larger amplitude will have a higher loudness, while a sound with a smaller amplitude will have a lower loudness. In other words, the greater the amplitude of a sound wave, the louder it will be perceived.
About this Document
|
4.60/5 Rating |
|
Oct 24, 2024 Last updated |
Document Description: Long Answer Questions - Sound for Class 8 2024 is part of Science Class 8 preparation.
The notes and questions for Long Answer Questions - Sound have been prepared according to the Class 8 exam syllabus. Information about Long Answer Questions - Sound covers topics
like and Long Answer Questions - Sound Example, for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Long Answer Questions - Sound.
Introduction of Long Answer Questions - Sound in English is available as part of our Science Class 8
for Class 8 & Long Answer Questions - Sound in Hindi for Science Class 8 course.
Download more important topics related with notes, lectures and mock test series for Class 8
Exam by signing up for free. Class 8: Class 8 Science Chapter 11 Question Answers - Sound
Description
Full syllabus notes, lecture & questions for Class 8 Science Chapter 11 Question Answers - Sound - Class 8 | Plus excerises question with solution to help you revise complete syllabus for Science Class 8 | Best notes, free PDF download
Information about Long Answer Questions - Sound
In this doc you can find the meaning of Long Answer Questions - Sound defined & explained in the simplest way possible. Besides explaining types of
Long Answer Questions - Sound theory, EduRev gives you an ample number of questions to practice Long Answer Questions - Sound tests, examples and also practice Class 8
tests
|
Explore Courses for Class 8 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Sample Paper
,ppt
,Viva Questions
,video lectures
,Semester Notes
,MCQs
,past year papers
,Summary
,Previous Year Questions with Solutions
,Exam
,Free
,Important questions
,mock tests for examination
,practice quizzes
,study material
,Class 8 Science Chapter 11 Question Answers - Sound
,shortcuts and tricks
,Class 8 Science Chapter 11 Question Answers - Sound
,Objective type Questions
,Class 8 Science Chapter 11 Question Answers - Sound
,Extra Questions
;
Additional Information about Long Answer Questions - Sound for Class 8 Preparation
Long Answer Questions - Sound Free PDF Download
The Long Answer Questions - Sound is an invaluable resource that delves deep into the core of the Class 8 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 Long Answer Questions - Sound now and kickstart your journey towards success in the Class 8 exam.
Importance of Long Answer Questions - Sound
The importance of Long Answer Questions - Sound cannot be overstated, especially for Class 8 aspirants.
This document holds the key to success in the Class 8 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.
Long Answer Questions - Sound Notes
Long Answer Questions - 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 Long Answer Questions - 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, Long Answer Questions - Sound Notes on EduRev are your ultimate resource for success.
Long Answer Questions - Sound Class 8
The "Long Answer Questions - Sound Class 8 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 8 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 Long Answer Questions - Sound on the App
Students of Class 8 can study Long Answer Questions - Sound alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Long Answer Questions - 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 Long Answer Questions - Sound is prepared as per the latest Class 8 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup