States of Matter

In class we have been learning about the different states of matter with our main focus being solids, liquids, and gas.  We have been learning about their properties and how some materials can change from one state to another.  Today we made ice-cream in a bag.  Our focus was how liquids can change to a solid by the removing of energy in this case cooling.  We discussed that the particle within the milk are becoming less energetic and merging together to form a tighter bond.  Here are some photos and the recipe we used.

What you’ll need:
1 tablespoon sugar
1/2 cup milk or half & half
1/4 teaspoon vanilla
6 tablespoons rock salt
1 pint-size plastic food storage bag (e.g., Ziploc)
1 gallon-size plastic food storage bag
Ice cubes
How to make it:
Fill the large bag half full of ice, and add the rock salt. Seal the bag. Put milk, vanilla, and sugar into the small bag, and seal it. Place the small bag inside the large one, and seal it again carefully. Shake until the mixture is ice cream, which takes about 5 minutes. Wipe off the top of the small bag, then open it carefully. Enjoy!
Tips:
A 1/2 cup milk will make about 1 scoop of ice cream, so double the recipe if you want more. But don’t increase the proportions more that that — a large amount might be too big for kids to pick-up because the ice itself is heavy.
Ice Cream in a Bag!
By: Nicole at kinderconfections.blogspot.com