Class 7 Science MCQs App | Sound Waves MCQs e-Book PDF

Class 7 Science MCQs (Grade 7) From Textbook

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

Sound Waves MCQs with Answers PDF Download – Test 5

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Free "Class 7 Science" App Download with MCQ: Vibrations are caused due to; with answers: change of pressure in air, change of temperature of air, effect of humidity on air, and level of heat in air for science digital school programs. Solve All Around Sounds MCQ Questions, download Google e-Book (Free Chapter) to improve middle school science.

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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