Snow is water that falls from clouds that have frozen into a solid and like the rain. Snow consists of particles of water vapor which then cools the air above (see the atmosphere, biosphere, climate, meteorology, weather) falls to earth as a piece soft, white, soft and crystal snowflakes, ferns such as ice crystals, the group of all).
At a certain temperature (called freezing point, 0 ° Celsius, 32 ° Fahrenheit), regular snow melt and disappear. Process when snow / ice turns directly into water vapor without melting it first called subliming. Opposite process is called deposition.
When the snow freezes, often a small fraction of so-called "snowflake". Snow is a prerequisite for winter sport activities like skiing and sled).
In the world, snow is common in subtropical and temperate countries are. However, there is also a snowy tropical regions, namely in Jayawijaya and Barisan Sudirman Mountains in Papua, Indonesia.
