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Deep freeze

Deep freeze

Follow these instructions to create super cooled water and learn why oceans don’t freeze solid.
What you need

To do this experiment you will need the following:
a freezer:
a spoon:
water:
salt:
ice:
two plastic glasses:
a marker pen:
an empty tin:

Water normally freezes (changes from a liquid to a solid) at around 0 ºC. However, adding salt to the water lowers the temperature at which water freezes. In other words, the salt makes it more difficult for the water to freeze solid so the water can be colder than 0 ºC and still not actually be frozen. Salty water does eventually freeze but the water has to be a lot colder than ordinary water.

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