Making a Slushy the Scientific Way.

This experiment takes time to work. Jacob mixed some salt in with the ice and then put a cup in the centre of the bowl and surrounded it with ice. He then poured the orange juice into the cup and he had to stir it every 10 mins. After a couple of hours the ice had started to melt but not as much as we thought it would. The orange juice was really cold but had not changed. So we got some more ice and put a lot more salt in this time. After about 1/2 hour the orange juice started to freeze. After another 3/4 hour quite a lot of the orange had turned into ice. Jacob really enjoyed his slushy before he went home today.

So what is the science behind this? Well, adding salt makes the ice melt at a lower temperature. In the bowl there is very cold salty ice and water. This mixture absorbs heat from the fruit juice, making the juice colder and colder. Eventually it will freeze solid if left alone. Jacob stirred it up to break up the ice so he could make slush instead.