Class 7 Science MCQs - Chapter 23
Sound Waves Trivia Questions & Answers PDF Download - 16
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The Sound waves Trivia Questions and Answers PDF (sound waves Quiz Answers PDF e-Book) download Ch. 23-16 to study Grade 7 Science Course. Practice Speed of Sound MCQ PDF, Sound Waves Quiz Questions and Answers to learn online classes courses. The Sound Waves Trivia App Download: Free certification app for speed of sound, sound and vacuum, musical instruments test prep for online degree programs.
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Sound Waves Test Questions and Answers PDF Download: MCQ 16
Sound travels more fast in
- air
- liquids
- solids
- all of above
Sound cannot travel in vacuum because
- there is no pressure in vacuum
- there is no air in vacuum
- there is no humidity in vacuum
- there are no particle in vacuum
Sound created by musical instruments is amplified by
- increasing string vibration
- decreasing string vibration
- wooden sound box
- metallic sound box
The length of air cutting is changed by
- valves
- fingers
- valves and fingers
- hands
An example of stringed instruments is
- guitar
- saxophone
- drum
- flute
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