Geography
Humidity, evaporation, and condensation
Practice questions
How can air become saturated even without cooling?Which process can be involved in frost formation on an icy surface?Why can relative humidity become lower in the afternoon even when actual vapour remains almost the same?At the same water temperature, why can strong wind increase evaporation compared with calm air?Why is water vapour called a variable gas?Why is most atmospheric water vapour found in the lower troposphere?If air is saturated, what may be the main result of further cooling?Why is vapour pressure useful in the study of humidity?If (e) is actual vapour pressure and (e_s) is saturation vapour pressure, which is the correct formula for (RH)?Which is the correct matching of heat exchange in evaporation and condensation?If cloud base suddenly becomes lower in an area, what moisture indication is likely?In which condition will evaporation be very slow even if surface water is available?Why is it wrong to treat relative humidity as the same as rainfall probability?How can salinity indirectly affect evaporation from a sea surface?On what basis is the main difference between mist and fog made?What meteorological effect follows from the decrease of water vapour with height?How can evaporation fog form when cold air moves over a warm water surface?Why can an increase in water vapour reduce night-time temperature fall?Which mechanism is most commonly involved in cooling air to the dew point before condensation?In which situation is frost more likely than dew?