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Class 7 Science MCQs – Practice Test 9 (Chapter 23)

Sound Waves MCQs with Answers PDF Download – Test 9

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Study Sound waves Multiple Choice Questions (MCQs) with Answers PDF to strengthen learning efficiency online. Download the Sound Waves MCQs PDF e-Book, Ch. 23-9 to study Class 7 Science Course. Learn Sound Waves Quiz Questions and Answers for STEM middle school education. Download the Sound Waves MCQs App: Free Class 7 Science Learning App to sound waves and noise, musics and musical sound, sound absorption, sound waves and echoes, musical instruments test prep for science digital education platforms.

Free Sound Waves MCQs App Download: "Measure of decibel starts from"; MCQ with answers: 20, 0, 20000, and 10. Solve Sound Waves and Noise MCQ Questions, download Google e-Book (Free Chapter) to strengthen learning efficiency online.

Sound Waves MCQs – Practice Test 9 PDF Download

MCQ 41: Measure of decibel starts from:

  1. 0
  2. 20
  3. 20000
  4. 10

MCQ 42: The mixture of high and low sounds is called a:

  1. rhythm
  2. bass effect
  3. beat effect
  4. wow effect

MCQ 43: Echoes are formed when sound:

  1. strikes a wall and reflects back
  2. strikes a wall and is absorbed
  3. hits the eardrum repeatedly
  4. breaks

MCQ 44: The use of echo to measure distance is known as:

  1. echo destination
  2. echolocation
  3. echo displacement
  4. echo dictation

MCQ 45: In a flute, the length of air cutting through the holes is changed by:

  1. changing length
  2. changing valves
  3. fingers
  4. sealers

Class 7 Science MCQs App & e-Book – Sound Waves Study Guide

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