Geography
Forms of condensation: dew, frost, fog, and mist
Practice questions
If liquid droplets appear on a car roof after a cold night and temperature is above freezing, what is it?If the same car roof has a white icy layer and the surface is below (0^\circ C), what will it be?Why is vertical stability of air important in fog?When dew point is below freezing, direct change of water vapour to ice promotes which form?Why does rain not occur in mist and fog despite the presence of water droplets?Why can fog appear more severe in some polluted cities?Why is high relative humidity helpful in dew formation?Which pair correctly distinguishes surface and aerial forms of condensation?In a valley with cold moist air and weak wind in the morning, which phenomenon is most likely?If mist gradually thickens and greatly reduces visibility, its classification may shift toward what?How is the place of condensation different for fog formation compared with dew formation?Which option gives the correct summary of all four forms?Frost and fog may both be linked with cold conditions, yet what is their main physical difference?If on a clear night the surface reaches dew point but water vapour in air is very low what will happen to dew formation?Dew on low grass but not on a higher dry twig in the same field can be explained by what?If surface temperature is below freezing but air is very dry why will frost formation be weak?Why can valley fog persist longer during a temperature inversion?How is the role of condensation nuclei best understood in fog formation?If maritime air reaches cold coastal land and dense fog forms what is the main mechanism?What is the main phase-change difference between dew and frost?