NCERT Important Questions Class 8 Science chapter 10 with Answer solution with pdf. Here We Provides Class 1 to 12 all Subjects NCERT Solution with Notes, Question Answer, CBSE and HBSE Important Questions, MCQ and old Question Papers for Students.
- Also Read :- Class 8 Science NCERT Solution
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CBSE and HBSE Solution of Class 8 Science chapter 10 Sound important Questions And Answer solution.
Class 8 Science Chapter 10 Important Questions and Answer
Q.1 What is Sound?
Ans – Sound is Vibrational motion of an object. Sound is produced through any material like solid, liquid and gas.
Q.2 What is Vibration?
Ans – Vibration is to and fro or back and froth motion of an object.
Q.3 How sound is produced by Humans?
Ans – We produce sound through our voice box or larynx. it is situated at the upper part of the windpipe in the throat. Two vocal cords are stretched across the voice box that produces sound.
Q.4 How sound is Travelled?
Ans – Sound Requires medium like solid, liquid and gas for their propagation. Sound can not be travelled in a vacuum Place.
Q.5 What is Frequency? What is the unit of Frequency? ( Most Important )
Ans – The total number of oscillations per second is called frequency. The SI Unit of frequency is Hertz ( Hz ).
Q.6 What is amplitude?
Ans – Amplitude is the height of a wave. it is denoted by a.
Q.7 What is audible and inaudible Sounds?
Ans – The Frequency of sound that we can listen is called audible sound. The very low frequency of sound that we can’t listen is called inaudible sound.
Q.8 What is noise pollution?
Ans – The unpleasant sound that we don’t want to listen any more is called noise pollution.
Q.9 What is Frequency of sound that we (Human) can listen? ( Most Important )
Ans – we can hear the frequency of 20 Hz to 20000 Hz.
Q.10 What is Music?
Ans – Music is a pleasant sound that we enjoy. Music may vary with interest of the person.