Class 7 Science MCQs - Chapter 23
Sound Waves Trivia Questions & Answers PDF Download - 12
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Sound Waves Test Questions and Answers PDF Download: MCQ 12
An example to demonstrate the effect of sound in vacuum is
- vacuum bell jar
- simple bell jar
- air pump and ring
- air pump and clock
Percussion instruments produce notes when they are
- struck
- banged
- blown
- shaken
Large concert halls have modified roofs which
- absorb sounds
- reflect sounds
- increase loudness of sounds
- decrease pitch of sounds
Ships send a small
- pulse to the sea bed
- vibration to the tower
- piece of food to fish
- beam of sound to check the depth
High frequency means
- low pitch
- high pitch
- low amplitude
- high wavelength
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