What is heat and why does an ice cube melt in your warm hand?
The Jiggle Journey
What is heat and why does an ice cube melt in your warm hand?
Hold an ice cube in your hand for a minute and something quietly dramatic happens. It softens. It drips. It vanishes into a cold little puddle. We tend to say your hand "gave it warmth," but what actually moved? To answer that, we need to meet the strangest dancer in the universe: heat.
Here's the secret that makes everything click. Everything around you is made of tiny pieces called atoms and molecules, and they are never, ever still. They jiggle. They bounce. They vibrate in place like a crowd that can't stop fidgeting. Heat is simply how much all that jiggling is happening.
