Winter in my hometown is the most beautiful.

Winter in my hometown is beautiful, winter in my hometown is cold, winter in my hometown is vast, and winter is coming. Before it snowed, the sky was lead. I don't know from which moment, the snow came to the world silently, just like the petals scattered by the fairy in the sky, white and flawless!

Gradually, the snow is getting heavier and denser, and the scene is really beautiful! Look! A group of children are playing there, having snowball fights, making snowmen and skiing ... The cheerful shouts shake off the snow on the trees, and the leafy trees are covered with shiny silver bars. In winter, not only the earth likes it, but also people in my hometown like it more! Listen! Although it is so cold in winter, there are constant shouts in the market.

Winter is a happy season, and it is a season that people remember vividly. I love winter, and I love winter in my hometown more. Snowflakes are mostly hexagonal, and there are so many patterns because the molecules of ice are mostly hexagonal. Hexagonal flake ice crystals.

Because of the different curvatures on its surface, edge and corner, it has different saturated vapor pressures, of which the saturated vapor pressure on the corner is the largest, the edge is the second, and the plane is the smallest.

Under the same actual water vapor pressure, the sublimation growth of ice crystals is different because of the different saturated water vapor pressures of each part.

For example, when the actual vapor pressure is only greater than the plane saturated vapor pressure, the vapor only condenses on the surface, forming columnar snowflakes.

When the actual vapor pressure is greater than the saturated vapor pressure of the edge, condensation will occur on the edge and surface. Because the speed of sublimation is also related to curvature, where the curvature is large, sublimation is faster, so the sublimation of ice crystal edge is faster than that of surface, forming more flake snowflakes.

When the actual vapor pressure is greater than the saturated vapor pressure at the corner, although there is vapor condensation at the surface, edge and corner, the sharp corner is prominent.

Water vapor is the most abundant, and condensation grows fastest, so many branches or star-shaped snowflakes are formed.

Coupled with the constant movement of ice crystals, their temperature and humidity conditions are constantly changing, which makes the growth rates of various parts of ice crystals inconsistent and forms various snowflakes.