Recently in our Science lessons, Year 3/4 have been learning about different states of matter. We have classified different materials according to whether they are solid, liquid or gas, looked at the properties of each state, and learned about how materials can change from one state to another if they get warmer or colder.
This week, we carried out an investigation to compare the melting points of different materials. We made ice cubes out of three different substances – water, chocolate and butter – and floated them in trays of hot water using an aluminium foil boat. To make sure our tests were fair, we had to make sure we used the same amount of each substance, and put them all on the water at the same time!
It didn’t take too long for us to get our results. The normal water ice cube melted quite quickly, the butter was next, and the chocolate was the last one to melt. In fact, for some of us, the water in the tray cooled too quickly to melt the chocolate at all! Over the next few lessons, we’ll be focusing in on the changing state of water specifically, and linking it to the water cycle.