Ice cream in a bag

19th May 15

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Making ice-cream has never been so easy!

 And the students from 3ºB can tell you that because this is what they did in Science class yesterday. To do our experiment we first went to the new Chemistry Lab. The aim of the experiment was to shake some liquid matter to turn it into solid matter. First we got all our ingredients ready and started working on it. While mixing the ingredients, the students started thinking about what would happen when we mixed ice and salt and then apply movement to a liquid, which in this case was whipping cream. They all came up with very interesting ideas however nothing had prepared them for the final result: a delicious vanilla ice-cream which they all enjoyed eating.

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Here is how you can make your own:

You will need: 1/2 cup whipping cream. 1 tablespoon of sugar. 1 teaspoon of vanilla extract. A clear small zipper bag. A clear big zipper bag. 2 cups of ice. 1/4 cup salt. Paper towels. Spoon.

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Directions:

1. Put the cream, sugar, and vanilla into the small bag. Press out all the air and close it. Make sure it is sealed. Put the bag inside the bigger one along with the ice and the salt. Seal the bag tightly. Now shake the bag as hard as you can for about 8-10 minutes.

2. Observe both bags’ contents once in a while. Do you see any changes? Continue shaking until the cream feels hard and solid.

3. Do you realize you just make ice-cream? It´s time to taste it!

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Now while you enjoy your very tasty and newly created solid matter, think about what happened. Why do you think the liquid cream turned solid? What happened with the ice and the salt?