Energy

This term we have been learning about energy these are the different forms of energy sound heat, light, electricity, kinetic potential and magnesium. the speed of sound is 332m/s, an interesting thing about the speed of sound is that actual travels faster through solids and liquids than gases. if an object breaks the speed of sound it is called a sonic boom. a sonic looks like a cone of cloud coming from the point of the object to the tail. what helped to understand this is watching videos of a sonic boom. In class we did a experiment when Mr marquand stood about 100m away and he clapped to pieces of wood together when he clapped them it took a while for sound to get to us so it was like him clapping then a second later you would here the sound. one of the that still confuses me is a light year many people have explained it to me but i still don't understand it. one of the things i learnt about energy is that energy cant be destroyed or created it can only be transferred. how does sound travel? i used to wonder about this until i learnt its a vibration sent through the which squeezes the molecules which vibrate and push the sound waves this is how sound waves are formed.