Class 7 science Practice Tests
Class 7 Science Online Tests
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The MCQ As compare to humans, bats can hear sounds only with: low frequency, low pitch, low amplitude and high pitch with "Sound Waves and Echoes" App Download (Free) for elementary school graduation certificate. Study sound waves quiz questions, download Amazon eBook (Free Sample) for free online courses.
MCQ 1: As compare to humans, bats can hear sounds only with
MCQ 2: The use of echo to measure distance is known as
MCQ 3: Some fishing boats use echo to
MCQ 4: Ships send a small
MCQ 5: The longer, the echo takes, the
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