Thursday, September 12, 2013

Hot water or Cold Water??? Which freezes faster?


Kim: Kendra needed to learn the Scientific Method, but I wanted to make it fun and memorable to help her remember it more. We found a simple experiment of testing the notion that hot water will freeze faster than cold water. We watched some You Tube videos about the experiment. Then, we did the experiment ourselves. We found that cold water freezes faster. The picture here is Kendra with her piece of ice that was the result.

Kendra: I know that cold water freezes faster than boiling water. Here's what happened...we put the cold water and boiling water in the freezer After the first 15 minutes, the cold water was very cold and the boiling water was cold. After 30 minutes, the cold water was very very cold and the boiling water was very cold. After 45 minutes the cold water was starting to crystallize, and the boiling water was still liquid. After 1 hour the cold water was soft ice, and the boiling water was starting to crystallize. After 1 hour and 15 minutes, the cold water was ice and the boiling water was soft ice. In the picture I am holding up the piece of ice from the cold water....and I had a refreshing snack when we were done! ;)



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