Web Reference: Learn how sound waves travel using a string telephone, a simple and fun science activity for kids. Find out how to make a string telephone with cups, twine, and markers, and why it works. Supplies: May 6, 2011 · When we talk, our vocal cords make molecules in the air vibrate. (You can feel the vibrations by holding your hand against your throat while you talk.) Those vibrating air molecules make other air...
YouTube Excerpt: Join Jessi and friends as they learn about sound waves by making a
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