We’ve now moved onto our next mini-topic, Hearing. In this topic, we’ll learn lots about sound: how it is made; how it travels; and how it can be changed.
We’ve already been using musical instruments to discover how sound travels throug
h the vibration of air molecules.
We then measured the volume of sounds around different locations in school using a decibel-o-meter on our iPads. Unsurprisingly, the hall at lunchtime was the loudest at over 100 decibels.
Finally this week, we carried a rather fun, but odd-looking investigation involving coat hangers. From this we learn that sound can also be transmitted through solid materials the same it way it is transmitted through the air – vibration of molecules.
