Download Sound Waves MCQ App | Class 7 Science e-Book PDF
Class 7 Science Entrance Tests: Practice Test 10 (Chapter 23)
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The Sound waves Multiple Choice Questions (MCQ Quiz) with Answers PDF (Sound Waves MCQ PDF e-Book) download Ch. 23-10 to learn Class 7 Science Course. Study Ultrasound Multiple Choice Questions and Answers (MCQs) PDF, Sound Waves Quiz Questions and Answers to study online certification courses. The Sound Waves MCQ App Download: Free Class 7 Science MCQs App to learn ultrasound, sound and vacuum, sound waves and echoes, all around sounds test prep for online school classes.
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A strong beam of ultrasound can melt even a
Sound can travel through air because
Some fishing boats use echo to
Most of the sounds around world are
X-rays are only reflected by
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