Class 7 Science MCQs - Chapter 23
Sound Waves Multiple Choice Questions (MCQs) PDF Download - 1
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Sound Waves MCQs with Answers PDF Download: Quiz 1
As compare to air, sound travels faster in
- liquids
- gases
- vacuum
- fluids
Sounds of vehicles, aircrafts and machines are called
- artificial sounds
- natural sounds
- noise
- normal sounds
Large empty room often sounds
- full
- hollow
- noisy
- repeating
For communication astronauts use radio because
- sound travels at very high speed in vacuum
- sound does not travel in vacuum
- vacuum repels sounds
- sound energy turns into light in vacuum
In concert halls, soft materials and carpets are used to
- increase sound waves
- absorb sound waves
- retract sound waves
- refract sound waves
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