Ice+Cream

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=**ICE CREAM**=

To know **how salt can change the freezing point and discover what effect temperatures have on phase changes**. 
 *  1/2 cup milk
 *  1/2 tsp. vanilla
 *  1 Tbsp. granulated sugar
 *  2 quart Ziploc bags
 *  1 gallon Ziploc freezer bag
 *  4 cups crushed ice
 *  4 Tbsp. salt
 *  Hand towel
 *  Gloves
 *  Spoon
 *  Bowl
 *  Chocolate Syrup
 *  Nuts
 *  Sprinkles

Steps > Measure out 1/2 cup milk, 1/2 tsp. vanilla and 1 tbsp. granulated sugar. Pour the three ingredients into a quart-size Ziploc bag. Close the bag, making sure it is sealed tightly after releasing any air. Place this bag into a second quart-size Ziploc bag to ensure the ice cream remains unpolluted. Seal the second bag again removing all the air. > > > >
 * 1
 * 2  Open one gallon-size Ziploc bag and place the sealed quart-size bag inside. Add 4 cups of crushed ice into the gallon-size bag around the smaller bag. Sprinkle 4 tbsps. of salt on top of the ice. Seal the large Ziploc bag.
 * 3  Wrap a hand towel around the outside of the bag for added insulation. You may want to wear gloves to protect your hands from the cold. Shake the bag gently up, down, left and right for 8 to 10 minutes. Use your fingers to squeeze and massage the bag while shaking.
 * 4  Remove the towel, open the gallon Ziploc bag and remove the smaller bag. Open carefully the first quart bag and remove the second bag. Open the bag and check to see if the ice cream has sufficiently congealed. If not, return the bag inside the other and replace it in the bigger bag. Continue to shake for an additional 5 minutes.
 * 5  Scoop the ice cream from the bag with a plastic spoon and put it into a plastic bowl. Dump the salt and ice mixture into a sink and throw away the plastic bags. Add chocolate syrup, nuts and sprinkles to the top of the ice cream before eating if desired

Read more: [|How to Make Ice Cream in a High School Lab | eHow.com] [|http://www.ehow.com/how_8002740_make-cream-high-school-lab.html#ixzz1WrTqAiWo]