In our science lessons this half term, we have been learning all about sound.
Last week, we learnt about how sound travels in waves and that it has to travel through a medium to reach our ears.
Most recently, we have been learning about which materials muffle (make quieter) sound the best – these are called sound insulators.
Here are some pictures of us muffling the sound of a buzzer using different materials such as foil, cloth and a plastic box.
After we had observed what happened when we muffled the buzzer with the different materials, we measured the number of decibels the buzzer produced before and after we muffled it.
We recorded these using the Numbers app and then made our own bar charts to show the data.
Ask your child if they can remember which material was the best sound insulator and why!
As an added challenge for your child, see if they can remember what medium and sound source mean!