Gun silensers and how they work.

Melted crayon art

Last week we were looking at melted crayon art.first we had to design our art on paper . after this we chose our canvas and our crayon coulors then we glued them after we melted the crayons. I really injoyed making my melted crayon art. the hardest thing for me was melting the crayon.

                                                      This is my ART

                                     This is my freind daniels which i thought looked really coolthese are the classes ones

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.