At a temperature of 0 degrees Celsius, liquid water becomes solid ice. Being less dense than water, an ice cube floats when dropped into a glass of water. When a little salt is sprinkled on the ice cube, it lowers the freezing point of ice and melts the layer in contact with the salt. As the surrounding water takes the place of the saline water, the freezing point of water increases, and it freezes in place of the melted salt layer.
Instructions
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1
Fill a glass with cold water and drop in an ice cube.
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2
Hold one end of the string in your hand and carefully place the other end on top of the ice cube.
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3
Sprinkle some salt on top of the ice cube next to the string and leave for 1 to 2 minutes.
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4
Raise the string in your hand above the glass, lifting the ice cube that is now attached to the string.