the frost that sparkles on the trees when ice forms on them
2006-11-28 20:26:08 · 3 answers · asked by scotia_girl1947 1 in Science & Mathematics ➔ Weather
Hoar frost (sometimes hoarfrost) refers to the white ice crystals, deposited on the ground or exposed objects, that form when the air is moist and surface is cold. Hoar frost is often seen on cold, clear autumn nights.
Hoar frost does not occur exclusively in nature. Hoar frost is also found in and around freezers particularly in industrial cold storage facilities. It occurs in adjacent rooms that are not well insulated against the cold and around entry locations where humidity and moisture will enter and freeze instantly depending on the freezer temperature.
Hoar frost is similar in appearance to rime ice, but the two are distinct. In formation of hoar frost, the water vapour condenses through deposition directly to solid ice whereas rime ice is formed following initial condensation into liquid droplets. Thus, hoar frost is formed when the dew point is warmer than surface but colder than the air temperature, and colder than freezing point. The formation of frost is an example of meteorological deposition.
2006-11-28 20:40:08 · answer #1 · answered by sugar candy 6 · 0⤊ 0⤋
Frost Hoar
2016-12-15 05:45:24 · answer #2 · answered by ? 4 · 0⤊ 0⤋
"Hoar" or "hoary" (from the Anglo-Saxon): white; white with frost or age; mouldy. "Hoar" just means white.
2006-11-28 20:37:00 · answer #3 · answered by AJ F 3 · 0⤊ 0⤋