how is it used in sports ?
Common examples include cross-country skiing, Alpine skiing, snowboarding, snowshoeing, and snowmobiling.
Snow
Common examples include cross-country skiing, Alpine skiing, snowboarding, snowshoeing, and snowmobiling. 
does it have to be 0 degrees snow UNANSWERABLE how is snow formed ? It consists of frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place, and ultimately melt, slide or sublimate away. how is it measured ? Among the measurements of the properties of snowpacks that the "International Classification for Seasonal Snow on the Ground" includes are: snow height, snow water equivalent, snow strength, and extent of snow cover. is it found outside earth ? Extraterrestrial "snow" includes water-based precipitation, but also precipitation of other compounds prevalent on other planets and moons in the Solar System
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Snow [SEP] Sports and recreation
Snow figures into many winter sports and forms of recreation, including skiing and sledding. Common examples include cross-country skiing, Alpine skiing, snowboarding, snowshoeing, and snowmobiling. The design of the equipment used, typically relies on the bearing strength of snow, as with skis or snowboards and contends with the coefficient of friction of snow to allow sliding, often enhance by ski waxes. Skiing is by far the largest form of winter recreation. As of 1994, of the estimated 65–75 million skiers worldwide, there were approximately 55 million who engaged in Alpine skiing, the rest engaged in cross-country skiing. Approximately 30 million skiers (of all kinds) were in Europe, 15 million in the US, and 14 million in Japan.