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Why does salt melt ice? lesson

Today we were learning about why salt melts ice. First we read about it here-http://antoine.frostburg.edu/chem/senese/101/solutions/faq/why-salt-melts-ice.shtml

Then we did a hands on lesson. 
First we took 3 gloves and filled them with water, halloween toys, and food coloring, Then placed them in the freezer.
Once frozen I peeled off the glove and gave my daughter two cups of salt with the ice hands.
Then using the salt tried to melt the ice to get the toys out.
In the end we ended up using her play tools too.

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