Oct 212011
 

We did some experiments on sound today.  We learned that sound travels 15 times faster through metal and bricks than air.  In the ear there is a little bone that sends signals to the brain, it tells it if it’s a high sound or low, loud or quiet and the bone is above the ear drum. Sound is shock wave of vibration. We did an experiment on making something move without touching it.  First you get a bowl and wrap it in cling film, second put sugar on it and then get an instrument and bang it and the sugar moves.

By Abbie

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