Water In Winter

With the arrival of winter you may have wondered about a few things. 

We know that those fluffy cumulus clouds, and also the layer stratus clouds, are composed of water droplets. Only the high, wispy cirrus clouds are composed of ice crystals. But if the low clouds are composed of water droplets, how can they exist if the temperature is below freezing?

Why is there a nearly-infinite variety in snowflake patterns, and why are the rings that form on icicles exactly one centimeter apart?

We know that sand is rock that has been broken down into grains by the force of waves over long periods of time. My theory is that the size of sand grains is due not to the nature of rock but to the nature of water.

This and other things about water, including why heavy water is the ideal material for nuclear fusion, is explained in the following compound posting:

www.markmeeklife.blogspot.com/2012/11/water-made-really-simple.html?m=0