So, what exactly happens when water reaches 0 degrees Celsius? Well, the molecules start to slow down and come together, forming a crystal lattice structure that we know as ice. But, here's the thing: pure water doesn't actually freeze at 0 degrees Celsius in all situations.
In fact, if you were to take a glass of pure water and put it in the freezer, it might not freeze immediately at 0 degrees Celsius. This is because water can exist in a supercooled state, where it stays liquid even below its freezing point. Isn't that wild?
But, what about the times when water does freeze at 0 degrees Celsius? Like, when you're outside on a cold winter day and you see a pond or lake frozen over. That's because the water in those situations is not pure, but rather a mixture of water and other substances like impurities or air bubbles.
Freezing Point - Definition, Examples, Quiz, FAQ, Trivia