MET1010 Exam 2 Chapter 5 o Dew is most likely to form on o Nights that are clear and calm o The name given to a liquid drop of dew that freezes when the air temperature o The cooling of the ground to produce dew is mainly the result of drops below freezing is o Frozen dew o Radiational cooling o For frozen dew to form o The dew point must be above freezing o The minimum temperature must fall to freezing or below o Dew must form and then freeze o Suppose it is a winter night and at about 10 p m the air cools to the dew point temperature and a thick radiation fog develops If the air continues to cool during the night in 5 hours the dew point temperature will probably o Decrease as the air becomes drier o Particles that serve as surfaces on which water vapor may condense are called o Condensation nuclei o Frost forms when o The dew point is at or below freezing o When the air temperature cools to the dew point and further cooling occurs water vapor can change directly to ice without becoming a liquid first a process called deposition o On a humid day the causes salty potato chips left outside in an uncovered o The attraction of water by hygroscopic condensation nuclei o Frost typically forms on the inside of a windowpane rather than the outside bowl to turn soggy because o There is more water vapor touching the inside of the pane o Condensation nuclei may be o Particles of dust nitric acid particles smoke from forest fires and salt from the ocean o Condensation nuclei are important in the atmosphere because o Without them condensation would not form easily in the atmosphere o Under what circumstances could the relative humidity exceed 100 percent without producing fog o There are no condensation nuceli o Wet haze forms when the relative humidity is o Less than 100 o On a cold winter morning the air near the surface is full of smoke particles If fog should form in this air it will probably be fog that forms in cleaner air o Thicker than o A valley type o Advection fog o Advection fog o High fog is also called o stratus o When radiation fog burns off the fog tends to dissipate o As the warmer air mixes in toward the denser foggy area o When fog burns off it o evaporates o On a clear night the minimum temperature drops to 34 F The following night fog forms early in the evening It is a good bet the minimum temperature will not be as low because of the o Absorption of infrared energy by the water vapor and fog droplets and the release of latent heat during condensation o Winter fog in the Central Valley region of California is mainly due to o Radiational cooling o On a cold winter morning the most likely place for radiation fog to form is o The fog that forms along the Pacific coastline of North America is mainly which o Fog that forms off the coast of Newfoundland is mainly a form of o Along an irregular coastline advection fog is more likely to form at the headlands than at the beaches because of the surface winds and air o If fog is forming at Denver Colorado and the wind is blowing from the east then o Converging rising the fog is most likely o Upslope fog o Exhaled breath from your mouth can condense when o Moist air from your mouth or nose meets the cold air and mixes with it o When you see your breath on a cold morning the air temperature o Can be above or below freezing o The use of helicopters to mix the air and disperse radiation fog at airports is effective provided that o The fog is shallow radiation fog with low liquid content o On a cold calm autumn morning the formation of fog above a relatively warm lake would most likely be o Steam fog o Evaporation fog o Warmer colder o Which fog does not necessarily form in air that is cooling o Frontal fog most commonly forms as raindrops fall into a layer of air o Fog that most often forms as warm rain falls into a cold layer of surface air is called o Evaporation mixing fog o Clouds are classified by their o appearance o A reasonably successful method of dispersing cold fog is to o To seed the fog with dry ice o Fog is a major hazard to aviation o True o Which association below is NOT correct o Altostratus high cloud 10 000 feet above the surface o Barrow Alaska the clouds o False o At which city might you be able to observe cirrus clouds at an altitude of 3 000 m o Even at high elevations where cirrus clouds are found liquid water still exists in o Which association below is not correct o Altocumulus castellanus resemble little castles o Which cloud is LEAST likely to produce precipitation that reaches the ground o Cirrocumulus o In middle latitudes which cloud will have the highest base o Cirriform clouds o A halo around the moon means that o Cirrostratus clouds are present the sun or moon o Cirrostratus clouds o Which cloud type is composed of ice crystals and can cause a halo to form around o Which of the following associations is not correct o Cumulus congestus anviltop o Light or moderate but steady precipitation is most often associated with o In middle latitudes which cloud will have the lowest base o Which of the following cloud types would be found at the highest elevation above clouds o Nimbostratus o Stratocumulus the earth s surface o Cirriform cirrostratus o Which of the following pairs of cloud types could be very similar in appearance o Altocumulus and cirrocumulus o Which clouds often appear in parallel waves or bands o A mackerel sky describes what type of cloud o Altocumulus o cirrocumulus observed with which cloud o Cirrocumulus o Cirrus clouds are composed primarily of o When viewed from the surface the smallest individual cloud elements puffs are o Ice o Cirrus clouds o Detached clouds of delicate and fibrous appearance without shading usually white in color and sometimes of a silky appearance are o Suppose the sky is completely covered with a thin white layered type cloud You look at the ground and see that objects cast a distinct shadow From this you conclude that the cloud type must be o At middle latitudes the base of an altostratus or altocumulus cloud would o A middle cloud that sometimes forms in parallel waves or bands is o A dim watery sun visible through a gray sheet like cloud layer is often a good o Cirrostratus generally be found between o 6 500 and 23 00 feet o Altocumulus indication of clouds o Altostratus o The name given to ragged looking clouds that rapidly drift with the wind beneath a rain producing cloud is o Stratus fractus or scud o …
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