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Type: Multiple-Choice
Category: Waves and Sound
Level: Grade 4
Score: 4
Tags: Sound
Author: Tywage
Last Modified: 5 years ago

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Waves and Sound Question

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Grade 4 Waves and Sound

What must happen in order for sound waves to form?
  1. An electric current must flow.
  2. A certain frequency must be reached.
  3. Matter must vibrate.
  4. Volume must be absorbed.
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