IProposeWe

Link: Make Ice Cream in a Baggie

Materials:

• 1/2 cup of milk



• 1/2 cup of whipping cream



• 1/4 cup of sugar



• 1/4 teaspoon of vanilla or vanilla flavoring



• 1/2 to 3/4 cup of sodium chloride as table salt or rock salt



• 2 cups of ice



• 1-quart ziploc bag



• 1-gallon ziploc bag

Procedures:

1. Add 1/4 cup of sugar, 1/2 cup of milk, 1/2 cup of whipping cream and 1/4 teaspoon vanilla to the quart-ziploc bag. Seal the bag securely.
   
2. Put 2 cups of ice into the gallon-ziploc bag.
   
3. Use a thermometer to measure and record the temperature of the ice in the gallon bag.


4. Add 1/2 to 3/4 cup of salt to the bag of ice


5. Place the sealed quart-bag inside the gallon bag of ice and salt. Seal the gallon bag securely.


6. Gently rock the gallon bag from side to side.


7. Continue to rock the bag for 10-15 minutes or until the contents of the quart bag have solidified into ice cream


8. Open the gallon bag and use the thermometer to measure and record the temperature of the ice/salt mixture.


9. Remove the quart bag and enjoy your ice cream.

Safety Precautions:

Wear gloves when you rock the gallon bag. It might damage your hand

Scientific Principles:

Ice absorbs the energy in order to melt. the energy is absorbed from the ingredients and from the outside environment. When you put salt into the ice, it lowers the freezing point of the ice so more energy can be absorbed. Ice gets colder and this is how your ice cream freezes.