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MARVIN & MILO'S MICROWAVE MARATHON EXPERIMENT .
WHAT YOU WILL NEED IS...
Ice cubes. Tap water. Scales. A microwave oven. Identical microwave-safe cups
WHAT YOU NEED TO DO IS...
Put a few ice cubes into a dry cup and weigh it.
Pour water into another cup until it weighs the same as the first one. (It is dangerous to heat distilled water in a microwave, so use tap water.)
Stand the cups on opposite sides of the oven’s turntable and microwave them. The water should boil before the ice melts!
HOW IT ALL WORKS.
Inside the oven there’s a quickly-changing electric field. Water molecules are slightly charged at both ends and in liquid water they keep rotating to stay in line with it, so their energy increases. Ice water molecules are fixed in a crystal structure and don’t rotate, so they don’t gain much energy by being microwaved.