Lesson: Chapter 4 — Waves and their applications

4.3. Sound and how it travels 1 of 5 Reset answers

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Question 1

What produces every sound?

A A vibrating object B Heat C Light D Wind alone

The right answer is the one marked above.

A vibrating object. A frog's throat membranes, a bee's wings and our vocal cords all make sound by vibrating.

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