In Science Club we were looking at the properties of custard when mixed with water. It is an unusual material because it can be a solid and a liquid at the same time.
First we discussed that custard powder is a solid material because it doesn't take the same shape as its container and then we mixed it with water. If we stirred quickly it turned into a solid and if we left it or stirred slowly it became a liquid.
This is because the particles in custard powder particles move around in the water freely and so the mixture behaves like a liquid. When you mix more thoroughly, the solid particles rub together causing friction which makes them stick together making the mixture behave more like a solid. We then cooked the custard with some milk and sugar and ate it! Yum!
The children took the photos themselves using the new children's cameras. It was the first time they had used them so a lot of experimenting was done!
Ms R Canning