Hot or Cold?

We did an awesome experiement in Science last week. We had jars of hot and cold water. We colored the cold water blue and the hot water yellow. First, we put the cold water on top of the hot water and the colors mixed right away because the cold water is heavier than the hot. The water became green. Next, we put the hot water on top of the cold water. It was so cool, because the colors didn't mix! We made predictions about how long it would take for the colors to mix. It took longer than we expected! Finally, the water cooled down enough for the colors to mix. It was a great Science lesson!