Y4CF Learn all about how sound travels

Date: 5th Nov 2020 @ 2:55pm

Today we've been outside learning all about how sound travels.  Sound waves are created when sounds make vibrations in the air. We learnt that when your voice vibrates the air inside the cup, it then transfers to the bottom of the cup. The bottom of the cup passes the sound waves to the string, and so on to the other cup. You can hear surprisingly far using a string telephone if held the right way!

If the string is kept tight, the sound waves will travel. If the string is loose, the sound is less. This is because the lose string causes the vibrations to travel all around rather than directly down the string.