On Tuesday we conducted an experiment called "Light vs Sound" where we blew up balloons filled with icing sugar and popped them to see if we would see the balloon explode before we heard it, as light travels faster than sound. However, when we are so close to an event like this, our brains cannot perceive the difference . Some of us where sure we heard the balloon first, while others were unsure. We were all interested to learn that the experiment was flawed.
On Wednesday we tried to see sound. We created mini drums out of glass jars with balloons stretched over the top of them. We then placed sugar granules on top of the balloon and hummed, trying to see if we could make the sugar vibrate. The science book we have told us that the sugar would vibrate because of the sound we were making, but it asked us to hum quite close to the jar. Some of the students then realised that it was their breath that was causing the vibrations instead of sound. We then watched a video about how we could see sound, but the scientists performed this experiment on a much larger scale.