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13. Sound Class 8 SCIENCE Solutions English Medium-Chapter Review
13. Sound Class 8 SCIENCE Solutions English Medium-Chapter Review Get chapter-wise detailed explanations, step-by-step answers, important questions and exam-ready study material in Hindi and English medium.
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13. Sound Class 8 SCIENCE Solutions English Medium-Chapter Review
NCERT Solutions for Class 8 are specially prepared according to the latest CBSE syllabus (2026-27) to help students understand every concept clearly. These solutions provide step-by-step explanations, accurate answers, and exam-oriented guidance for all chapters. Class 8 students can improve their problem-solving skills, strengthen conceptual understanding, and prepare confidently for school as well as board examinations. All questions are solved in a simple and easy-to-understand language for both Hindi and English medium learners.
13. Sound Class 8 SCIENCE Solutions English Medium-Chapter Review
NCERT Solutions Class 8 SCIENCE English Medium
13. Sound
Topic: 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.
All Topics From 13. Sound
See other sub-topics of this chapter:
1. Chapter Review 2. Text Book Exercise 3. Text Book Exercise 4. Additional Questions With Solutions 5. Additional Questions With SolutionsNCERT Solutions Class 8 Hindi and English Medium – Complete Study Material
NCERT Solutions Class 8 students ke liye specially CBSE latest syllabus (2026-27) ke according prepare kiye gaye hain. Yeh solutions Hindi aur English medium dono ke liye available hain, jisse har student apni language preference ke hisaab se padh sakta hai. Har chapter ke sabhi prashnon ke step-by-step answers diye gaye hain jo concept clarity aur exam preparation me madad karte hain.
Chapter-Wise Detailed Explanations
Class 8 ke liye diye gaye Chapter Wise NCERT Solutions me har question ka detailed aur easy explanation diya gaya hai. Chahe aap CBSE Board Exam Preparation kar rahe ho ya school test ke liye revise kar rahe ho, yeh solutions aapko complete understanding denge. Har answer simple language me likha gaya hai jisse students concepts ko easily grasp kar saken.
Hindi and English Medium Support
Students Hindi aur English medium dono me NCERT Book Solutions Class 8 access kar sakte hain. Yeh dual language support un students ke liye helpful hai jo apni regional language me better samajhna chahte hain. Sabhi answers CBSE Latest Syllabus 2026-27 ke anusaar update kiye gaye hain.
Important Features of NCERT Solutions
- Class 8 NCERT Solutions PDF
- CBSE Class 8 Study Material
- NCERT Book Questions and Answers
- Exam Oriented Important Questions
- Step-by-Step Detailed Solutions
- Concept Clarity and Revision Notes
Why Students Should Use NCERT Solutions?
Aaj ke competitive environment me sirf textbook padhna kaafi nahi hota. NCERT Solutions for Class 8 students ko practice aur conceptual understanding dono provide karte hain. Yeh solutions unhe exam pattern samajhne, frequently asked questions practice karne aur high score achieve karne me madad karte hain. Regular practice se students apne weak topics ko improve kar sakte hain.
Best Resource for Exam Preparation
Agar aap Class 8 CBSE Preparation ke liye ek trusted aur reliable source dhundh rahe hain, to yeh NCERT Solutions perfect choice hain. Yeh study material school exams, unit tests, half-yearly aur annual exams ke liye equally useful hai. Har chapter ke answers accurate, verified aur student-friendly format me diye gaye hain.
Isliye agar aap NCERT Solutions Class 8 Hindi and English Medium search kar rahe hain, to yahan aapko complete chapter-wise solutions milenge jo aapki academic journey ko strong aur confident banayenge.