Why is some of the ice outside very slippery and some of it not?
In: 12
It depends on the surface water.
If the ice spends lots of time around and below the freezing point, some ice will melt from the sun and freeze in the shade or as temperature drops.
Traffic also affects the surface. Lots of shoes and cars going over the glass creates pressure and friction that polishes and melts a little bit of ice and that water once again fills the bottom of those little rough patches and the freezes smoothing everything out.
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