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ICE CREAM MATTERS. A TASTY PHASE CHANGE. Safety First!!!!. Follow all instructions Report all accidents. Materials:. 1/2 cup milk
1/2 teaspoon vanilla
1 tablespoon sugar
4 cups ice
4 tablespoons salt 1 sandwich size bag 1 quart size Zip- loc bag (double to prevent spill)

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ice cream matters

ICE CREAM MATTERS

A TASTY PHASE CHANGE

safety first
Safety First!!!!
  • Follow all instructions
  • Report all accidents
materials
Materials:
  • 1/2 cup milk
1/2 teaspoon vanilla
1 tablespoon sugar
4 cups ice
4 tablespoons salt

1 sandwich size bag

1 quart size Zip-loc bag (double to prevent spill)

1 gallon size Zip-loc freezer bag
A hand towel or gloves to keep fingers from freezing as well!

step 1 mix the milk vanilla and sugar together in the sandwich size bag
Step 1: Mix the milk, vanilla, and sugar together in the sandwich size bag

BE CAREFUL:Seal tightly, allowing as little air to remain in the bag as possible!!!!

step 2 put the sealed milk mixture bag into the quart size zip loc bag to prevent leaks and seal
Step 2: Put the (sealed!) milk mixture bag into the quart size Zip-loc bag to prevent leaks and seal
step 2 put the bags inside the gallon size bag and fill the bag with ice then sprinkle salt on top
Step 2: Put the bags inside the gallon size bag and fill the bag with ice, then sprinkle salt on top

****Sealed release air!!!!

step 3 wrap the bag in the towel and shake the bag making sure the ice surrounds the cream mixture
Step 3:Wrap the bag in the towel, and shake the bag, making sure the ice surrounds the cream mixture.
consider the following
Consider the following:
  • What state of matter was the milk when you began?
  • What state of matter was the milk when you were done?
  • In order to change the phase of the milk, what had to be removed?
  • What happened to the heat energy that left the milk?
  • Why was the salt added to the ice?
  • If you did not add sugar would the ice cream have frozen faster? Why?
  • Why did the outside of the bag get wet? (Assume that your bag did not spring a leak.)
  • Extension: Why is salt spread on the roads before a winter storm?