Class 7 Science MCQs (Grade 7) From Textbook

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Class 7 Science Competitive Exam MCQs – Practice Test 5 (Chapter 23)

Sound Waves MCQs with Answers PDF Download – Test 5

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The Sound waves Multiple Choice Questions (MCQs) with Answers PDF (Sound Waves MCQs PDF e-Book) download Ch. 23-5 to study Class 7 Science Course. Learn Sound Waves Quiz Questions and Answers to study online school courses. The Class 7 Science MCQs App Download: Free Sound Waves App for all around sounds, musics and musical sound, sound waves and noise, sound and vacuum, musical instruments test prep for online elementary school classes.

The MCQ: Vibrations are caused due to; "Class 7 Science MCQs" App Download [Free] with answers: change of pressure in air, change of temperature of air, effect of humidity on air, and level of heat in air to study online school courses. Solve All Around Sounds MCQ Questions, download Google e-Book (Free Chapter) for online education.

Sound Waves MCQs – Practice Test 5 PDF Download

MCQ: 21

Vibrations are caused due to

  1. change of temperature of air
  2. change of pressure in air
  3. effect of humidity on air
  4. level of heat in air
MCQ: 22

The only thing of a note that can vary, is

  1. amplitude
  2. length
  3. wave
  4. type
MCQ: 23

Loud noise can

  1. damage our ears
  2. make us ill
  3. disturb our sleep
  4. interrupt conversation
MCQ: 24

We cannot hear alarm of a clock if there is

  1. vacuum in the jar
  2. air in the jar
  3. liquid in the jar
  4. solid in the jar
MCQ: 25

The third effecter of sound created by vibrating strings is

  1. angle of strings
  2. thickness of strings
  3. material of strings
  4. height of strings

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