Class 7 Science Online Tests
Sound Waves and Noise MCQ Quiz Online PDF Download
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Class 7 Science MCQs: Sound Waves and Noise Quiz Questions PDF Download
MCQ: Sound is measured by units that are called
MCQ: 20 dB has hundred times more energy than
MCQ: 'Eardrum' bursts at
MCQ: The level of sound of normal conversation is
MCQ: Loud noise can
Practice Tests: Class 7 Science Exam Prep
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