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Class 7 Science Certification MCQs – Practice Test 27 (Chapter 23)

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Sound Waves Quiz – Practice Test 27 PDF Download

MCQ 131: Two similar string instruments are:

  1. piano and guitar
  2. piano and violin
  3. guitar and violin
  4. harp and piano

MCQ 132: Notes are put together to produce a pleasing sound known as:

  1. noise
  2. pitch
  3. music
  4. phase

MCQ 133: Sounds with a high frequency which a human ear can detect are known as:

  1. infrasound
  2. ultrasounds
  3. high sounds
  4. low sounds

MCQ 134: When the hand bell stimulates air particles,:

  1. temperature increases
  2. pressure increases in the air
  3. both temperature and pressure decreases in the air
  4. humidity of air keeps on increasing and decreasing

MCQ 135: To avoid noise from the surroundings:

  1. soft curtains should be used
  2. hard curtains should be used
  3. glass windows should be used
  4. vacuum windows should be used

Class 7 Science Quiz App & e-Book – Sound Waves Certification Guide

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