Last week we learned all about lowering the freezing point of water. Using salt, we slightly melted chunks of ice and watched as the water refroze around a piece of string.
After sprinkling the salt on the ice we observed for about three minutes. We watched the ice change from one state of matter - a solid, into a different state of matter - a liquid. Then the liquid changed again, back into a solid as it froze around the string.
We had to be very careful picking up the string. Sharp or sudden movements caused the ice to fall. We also tried changing this experiment with the ice in a cup of water. Ask your student what happened!
This experiment was the first of many hands on science projects we will do this year. Coming up this week... we will learn about colloids as part of our states of matter unit.
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