Pick up an Ice Cube with Cold String
Really Cold Activity
You need:
One ice cube
Packet of Salt
String
Goal:
Pick up ice cube with string.
Directions
Put wet string on top of ice cube. Put salt on top of string. Let sit for 1 minute. Pick up ice cube
with string.
Questions
Did it work?
Explanation to the "Really Cold Actity"
The melting of ice is an endothermic process. Endothermic means that it takes heat from its
surroundings. The temperature of the surroundings decreases. When salt is sprinkled on
the string and the ice cube, some of the ice melts. As it melts, it absorbs heat from its
surroundings, which included the damp string. As the string loses heat, the water in the
string freezes causing it to attach to the ice cube.
You need:
One ice cube
Packet of Salt
String
Goal:
Pick up ice cube with string.
Directions
Put wet string on top of ice cube. Put salt on top of string. Let sit for 1 minute. Pick up ice cube
with string.
Questions
Did it work?
Explanation to the "Really Cold Actity"
The melting of ice is an endothermic process. Endothermic means that it takes heat from its
surroundings. The temperature of the surroundings decreases. When salt is sprinkled on
the string and the ice cube, some of the ice melts. As it melts, it absorbs heat from its
surroundings, which included the damp string. As the string loses heat, the water in the
string freezes causing it to attach to the ice cube.
 | |  | |  | |  | |  | |  |