Water is a big deal. Often called “the solvent of life” because of its remarkable ability to dissolve other substances. Water is also a rare substance whose solid, liquid, and gas forms all exist at human-friendly temperatures. Adult human bodies are 60% water and babies are 78% water. Babies are basically water balloons.
When water is ice, its molecules are arranged in a solid configuration. As heat increases past 0°C, water molecules come loose from the rigid configuration and start rolling around each other. As heat increases even more, the molecules start jiggling so vigorously that some fly off from the rest and into the air as water vapor. Once water passes 100°C, the jiggling becomes too much to keep any of the molecules together and they boil away.
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