Hmm a question on ice skating
Ice skating is possible because of a phenomenon called "regelation," where ice melts and refreezes due to pressure or friction. When an ice skater glides across the ice, their skates apply pressure to the ice, which causes it to melt slightly. As the ice melts, it forms a thin film of water on the surface of the ice. This film of water is quickly refrozen by the cold air around it, leaving a smooth, glassy surface behind. This process is repeated every time the skater moves their foot, which is why no tracks are left on the ice. Pretty cool, right?