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solid ice is very slippery. Why ( not all solids are slippery) it is only recently...

solid ice is very slippery. Why ( not all solids are slippery) it is only recently that scientists have actually figured out what causes this . explain also why a skate works on the surface of the ice
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In a skating rink, the temperature is kept in the range where a nice slippery quasi-liquid-layer exists. The surface molecules are free to move around some and they are easily pushed out of the way as the blades move over the ice. Because they are free to move around they do not obstruct the motion of the blade or grab onto the blade and slow it down to any significant extent. Ice is slippery because at the temperatures inside ice rinks (and outside in most winter climates) the surface layer of the ice behave like a layer of ball bearings on top of which your blades glide.So, it's not about pressure, it's not about heating due to friction. Ice is slippery because at the right temperatures its surface just is, and the skater doesn't have to do anything to make it that way

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