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CBSE class 8 sound questions (Fill in the blanks)




This page contains cbse class 8 sound questions (Fill in the blanks) along with theit answers. We also have notes for this chapter that can be ascessed through links given below
Sound notes
  1. Loudness of sound depend on …………….
  2. Sound absorbing materials are required in auditoria to avoid ……………
  3. The property of sound that is used by animals to find their way and locate their food is………..
  4. The two kinds of sounds we cannot hear are ……………. And ………….
  5. ……………… of any kind is the principle source of production of sound.
  6. …………… instrument used in the laboratory to produce sound of a fixed frequency.
  7. Sound needs a …………….. medium for propagation.
  8. The vibrations of a simple pendulum are also known as ……………….
  9. A soft board will………………… most of the sound falling on it.
  10. The number of vibrations completed in one second is known as ………….
  11. ……………. Is proportional to the square of amplitude.
  12. If the thickness of the vibrating string is increased its pitch ………………
  13. Speed of sound highest in …………… medium.
  14. The range of audible frequency for the human ear is……………
  15. Noise is produced by……………..



 Answers:

  1. Amplitude
  2. Noise pollution
  3. Echo
  4. Infrasonic and Ultrasonic
  5. Vibrations
  6. Tuning fork
  7. Material
  8. Oscillations
  9. Absorb
  10. frequency
  11. Loudness
  12. Decrease
  13. solid
  14. 20Hz to 20,000Hz
  15. Irregular and non-periodic vibrations


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Class 8 Maths Class 8 Science
Reference Books for class 8 science

Given below are the links of some of the reference books for class 8 science.

  1. Oswaal NCERT & CBSE Pullout Worksheets Class 8 Science These worksheets can help student evaluate whatever he/she has studied from the text books.
  2. Science for Class 8 Paperback by Lakhmir Singh Detailed science book to clear basics and concepts. I would say it is a must have book for class 8 student.
  3. Pearson Foundation Series (IIT -JEE / NEET) Physics, Chemistry, Maths & Biology for Class 8 (Main Books) | PCMB Combo : These set of books could help your child if he aims to get extra knowledge of science and maths. These would be helpful if child wants to prepare for competitive exams like JEE/NEET. Only buy if you can provide help to the child while studying.
  4. Reasoning Olympiad Workbook - Class 8 :- Reasoning helps sharpen the mind of child. I would recommend students practicing reasoning even though they are not appearing for Olympiad.

You can use above books for extra knowledge and practicing different questions.







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