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13. Sound-Chapter Review Science Class 8 In English
Last Updated : 06 March 2026
Explore science Solutions for Class 8 Chapter 13. Sound Topic Chapter Review in English medium.
13. Sound-Chapter Review Science Class 8 In English
Last Updated : 06 March 2026
13. Sound-Chapter Review Science Class 8 In English
13. Sound
Chapter Review
Chapter Review:
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When an object vibrates, it produces sound.
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When any sound reflects by striking on any medium, that sound heard us again and again. This is called eco sound.
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The audible range of human ears is 20 Hz to 20,000 Hz.
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The S.I unit of frequency is Hz (Hertz).
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The S.I unit of wave length is meter.
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The to and fro or back and forth motion of an object is termed as vibration.
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In humans, the sound is produced by the voice box or the larynx.
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The vocal cords in men are about 20mm long. In women these are about 5mm shorter.
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When air has been removed completely from a vessel, it is said that there is vacuum in the vessel.
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When sound enters in it, it travels down a canal at the end of
which a thin membrane is stretched tightly. It is called the eardrum. -
The to and fro motion of an object is known as vibration. This motion is also called oscillatory motion.
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The number of oscillations per second is called the frequency of oscillation.
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The loudness of sound depends on its amplitude. When the amplitude of vibration is large, the sound produced is loud. When the amplitude is small, the sound produced is feeble.
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The loudness is expressed in a unit called decibel (dB).
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Unpleasant sounds are called noise.
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Some animals can hear sounds of frequencies higher than 20,000 Hz.
Dogs have this ability. -
Sound travels through a medium (gas, liquid or solid). It cannot travel in vacuum.
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NCERT Solutions for Class 8 science Chapter 13. Sound Topic Chapter Review
NCERT Solutions for Class 8 science Chapter 13. Sound Topic Chapter Review are prepared to help students understand important concepts of the chapter in a simple and clear manner. These solutions are based on the latest CBSE syllabus and follow the official NCERT textbooks. Students who are searching for accurate answers and step-by-step explanations can use these solutions to improve their learning and prepare better for school exams as well as board examinations.
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About Chapter 13. Sound of Class 8 science
Chapter 13. Sound is an important part of the Class 8 science syllabus. This chapter explains several key concepts which are essential for understanding the subject in detail. Students often face difficulties while solving textbook questions related to this chapter. That is why NCERT Solutions for Chapter 13. Sound are provided to explain every concept in a simple and structured way.
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Understanding Topic: Chapter Review
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Conclusion
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13. Sound-Chapter Review Science Class 8 In English
Hindi Medium Students/Teachers/Tutors:
All Chapters science Class 8
Class Wise NCERT Solutions
Students can find NCERT Solutions for Class 6, Class 7, Class 8, Class 9, Class 10, Class 11, and Class 12 on this page. Each class includes detailed solutions for important subjects such as Science, Mathematics, Social Science, English, and Hindi. These solutions are carefully prepared to ensure accuracy and clarity.
- NCERT Solutions for Classes 6 to 8 – Ideal for building strong basic concepts.
- NCERT Solutions for Classes 9 and 10 – Helpful for board exam preparation.
- NCERT Solutions for Classes 11 and 12 – Important for advanced concepts and competitive exams.
13. Sound-Chapter Review Science Class 8 In English Study Materials For Class 6 to 12
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