In four bowl I put an ice cube. One bowl had a plain one, one bowl had salt sprinkled on top, one was wrapped in foil, and the fourth was wrapped in the plain brown paper towel available at school.
We set up the experiment, then then I polled the class to see which one they believed would melt first. After about an hour, we checked the status of the ice cubes and made our conclusions. Then we discussed how and why some melted faster than others.
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