Do you think it is good to snow?

Snow is beneficial to the growth and development of crops.

2, often bathing with snow water can not only enhance the resistance of the skin and body, reduce diseases, but also promote blood circulation and enhance physical fitness. Drinking clean snow water for a long time can prolong life. This is one of the "secrets" of the old people who have lived in the deep mountains and forests for a long time.

Snow is like a wonderful carpet, covering the ground, so that the temperature of the ground will not drop too low because of the cold in winter. This heat preservation effect of snow is inseparable from its own characteristics.

4. Urban snowfall plays an extremely important role in alleviating and supplementing the shortage of urban water resources in winter and improving and protecting the ecological environment.

Extended data:

The principle of snow formation:

Ice cloud is made up of tiny ice crystals. When these small ice crystals collide with each other, the surface of the ice crystals will heat up and melt, and they will stick together and freeze again. Repeat this for many times, and ice crystals will increase.

In addition, there is water vapor in the cloud, so ice crystals can continue to grow through condensation. However, where the ice cloud is generally high but not thick, and there is not much water vapor, the condensation growth is slow, and there are not many opportunities to collide with each other, so it cannot grow to a great extent to form precipitation. Even if it causes precipitation, it often evaporates in the process of falling and rarely falls to the ground.

The most favorable cloud droplet growth is the mixed cloud. The mixed cloud consists of small ice crystals and supercooled water droplets. When a mass of air is saturated with ice crystals, it is unsaturated with water droplets.

At this time, the water vapor in the cloud condenses on the surface of ice crystals, while the supercooled water droplets are evaporating, which produces the phenomenon that ice crystals "adsorb" water vapor from supercooled water droplets. In this case, ice crystals will grow rapidly. Besides, supercooled water is very unstable. If you touch it, it will freeze.

Therefore, when supercooled water droplets collide with ice crystals in mixed clouds, they will freeze and adhere to the surface of ice crystals, making them grow rapidly. When small ice crystals grow up, they overcome the resistance and buoyancy of air and fall to the ground. This is snow.

References:

Baidu encyclopedia-snow