Energy

This term our topic is energy. There are different forms of energy. Light, electricity, chemical and many more. But the one type of energy we have mainly been working on is sound. Sound is vibrations moving through the air. It moves like a ripple effect. It vibrates the air around it, then that air around that and so on. We did heaps of cool experiments with Mr Marquands awesome speaker, like freqency/pitch. One of the things we have learnt is how fast sound travels. Did you know that sound travels 332 metres per second? Light can travel 7 times around the world in 1 second! That explains why lightning always comes before thunder, because light (obviously) travels faster than sound. I wonder why light travels faster than sound? Then there is conservation of energy. Which is when energy can't be created or destroyed, but just changed into different forms. For example, in a hydro dam, the still water is potential energy, then when it goes down its called kinetic energy and then it changes into magnetic energy and then changes into electricity which changes into light, heat, or sound etc. It's pretty interesting learning about sound. I can't wait to do another experiment around it!