It's actually pretty cool (again, pun intended) when you think about it. At 32 degrees Fahrenheit, the molecules in water slow down to the point where they can't move freely anymore, and they start to bond together in a crystalline structure, forming ice. It's like a big, natural game of molecular Tetris!
And have you ever noticed how freshwater and saltwater behave differently when they freeze? That's because the salt in saltwater lowers the freezing point, so it takes a bit more cold to turn it into ice. It's like the salt is saying, "Hey, I've got this, I can handle a bit more cold before I freeze up!"
PPT - Freezing/Melting and Boiling Points PowerPoint Presentation, free
Now, you might be wondering, what about supercooled water? That's when water stays in a liquid state even below its freezing point, like a temporary molecular truce. It's a pretty rare and fascinating phenomenon, and scientists are still trying to fully understand it.
