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13. Sound Science class 8 in English Medium ncert book solutions Additional Questions With Solutions
13. Sound Additional Questions With Solutions – Complete NCERT Book Solutions for Class 8 Science (English Medium). Get all chapter explanations, extra questions, solved examples and additional practice questions for 13. Sound Additional Questions With Solutions to help you master concepts and score higher.
13. Sound Science class 8 in English Medium ncert book solutions Additional Questions With Solutions
NCERT Solutions for Class 8 Science play an important role in helping students understand the concepts of the chapter 13. Sound clearly. This chapter includes the topic Additional Questions With Solutions, which is essential from both academic and examination point of view. The solutions provided here are prepared strictly according to the latest NCERT syllabus and follow the guidelines of CBSE to ensure accuracy and relevance. Each question is explained in a simple and student-friendly manner so that learners can grasp the concepts without confusion. These NCERT Solutions are useful for regular study, homework help, and exam preparation. All textbook questions are solved step by step to improve problem-solving skills and conceptual clarity. Students of Class 8 studying Science can use these solutions to revise important topics, understand difficult questions, and practise effectively before examinations. The chapter 13. Sound is explained in a structured way, making it easier for students to connect the theory with the topic Additional Questions With Solutions. By studying these updated NCERT Solutions for Class 8 Science, students can build a strong foundation, boost their confidence, and score better marks in school and board exams.
13. Sound
Additional Questions With Solutions
Additional Questions With Solutions
Ques: What is sound?
Ans: When an object vibrates, it produces sound.
Ques: What is eco sound?
Ans: When any sound reflects by striking on any medium, that sound heard us again and again. This is called eco sound.
Ques: What is minimum audible range for human ears?
Ans: The audible range is 20 Hz to 20,000 Hz.
Ques: What is minimum audible distance from sound source to barrier medium?
Ans: 17.2 m.
Ques: What is S.I unit of frequency?
Ans: Hz (Hertz).
Ques: What is S.I unit of wave length?
Ans: S.I unit of wave length is meter.
Ques: By what organ human produces sound?
Ans: Vocal cord. (Larynx)
Ques: How do we produce sound?
Ans: Two vocal cords, are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air When the lungs force air through the slit, the vocal cords vibrate, producing sound.
Ques: In which mediums sounds propagate?
Ans: Solid, liquid and gas.
Ques: In which medium sound does not propagate?
Ans: Vacuum.
Ques: What is eardrum?
Ans: The shape of the outer part of the ear is like a funnel. 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.
Ques: Write the function of eardrum.
Ans: The eardrum sends vibrations to the inner ear.
Ques: What is oscillatory motion?
Ans: The to and fro motion of an object is known as vibration. This motion is also called oscillatory motion.
Ques: What is frequency? Write is its S.I unit?
Ans: The number of oscillations or vibrations per second is called the frequency of oscillation. The frequency is expressed in hertz (Hz).
Ques: On which measure does loudness of sound depend?
Ans: On its amplitudes.
Ques: What are two important properties of sound?
Ans: Amplitude and frequency are two important properties of any 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 Solutions