Topics in this chapter
- 1
Why Is Ice Slippery?Not because your weight melts it: that lowers the melting point by only a fraction of a degree. A thin liquid-like surface layer (premelting) and frictional melting do the work, and scientists still debate the details. Watch - 2
Why Does Ice Float?Most solids sink in their own liquid, but ice floats. How open hexagons make ice less dense, and why that keeps lakes alive. Watch