HERE'S HOW
Ask a friend: "Which freezes first, hot water or cold water?" Then try this: Fill one foam cup with cold water. Fill another foam cup with the same amount of very hot tap water. (Be careful not to burn yourself!) Immediately place both cups in the freezer. Check the cups every 15 minutes. The hot water freezes first!
WHY?
Hot water evaporates much faster than cold water. During evaporation, a great deal of heat energy is lost. The hot water freezes first because its temperature drops at a faster rate than that of the cold water.
FLOATING EGG»
Illustration by David Bamundo
Text by Julie Vosburgh Agnone
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