Sound work in Science in Year 4

Today we have been learning about sound: how it is made and how it travels.

Today we designed and carried out an experiment to find out which material made the egg shaker silent with the least number of layers.

Here are our wrapped up egg shakers. 

Can you tell the materials we used?

We used (top row l-r) brown paper, fabric (socks), tin foil; (front row l-r) paper towels, tissue paper and bubble wrap.

Many people predicted the tin foil would have the least layers because you can wrap it really tight and it doesn't have holes in. But actually it made the metal egg shaker just as loud. Our experiment showed that the brown paper had the least number of layers - 7 - and we thought perhaps that is why is is used for wrapping items to post.

Everyone enjoyed this experiment and we are going to explore pitch next week in science.