Class 7 Science Online Tests
Sound Waves and Noise MCQ (Multiple Choice Questions) PDF Download
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The MCQ: Sound is measured by units that are called; "Sound Waves and Noise" App Download (Free) with answers: hertz (hz), decibels (db), meters (m), and pascal (pa) to learn online classes courses. Solve Sound Waves Quiz Questions, download Apple eBook (Free Sample) for elementary school graduation certificate.
Sound Waves and Noise Questions and Answers PDF Download
Sound is measured by units that are called
- Hertz (Hz)
- Decibels (dB)
- Meters (m)
- Pascal (Pa)
20 dB has hundred times more energy than
- 10 dB
- 0 dB
- 5 dB
- 2 dB
'Eardrum' bursts at
- 40 dB
- 80 dB
- 160 dB
- 320 dB
The level of sound of normal conversation is
- 10 dB
- 20 dB
- 50 dB
- 60 dB
Loud noise can
- damage our ears
- make us ill
- disturb our sleep
- interrupt conversation
Class 7 Science Practice Tests
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