CHAPTER 5 Dew is most likely to form on Nights that are clear and calm than on nights that are cloudy and windy The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is Frozen Dew The cooling of the ground to produce dew is mainly the result of Radiational Cooling For frozen dew to form All of the above 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 Decrease as the air becomes dried Particles that serve as surfaces on which water vapor may condense are called Condensation Nuclei Frost forms when All of the above On a humid day the causes salty potato chips left outside in an uncovered bowl to turn soggy Attraction of water by hygroscopic condensation nuclei Frost typically forms on the inside of a windowpane rather than the outside because There is more water vapor touching the inside of the pane 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Condensation nuclei may be Particles of dust Condensation nuclei are important in the atmosphere because Without them condensation would not occur easily in atmosphere Under what circumstances could the relative humidity exceed 100 percent without producing fog There are no condensation nuclei present Wet haze forms when the relative humidity is Less than 100 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 Thicker than fog High fog is also called Stratus When fog burns off it Evaporates When radiation fog burns off the fog tends to dissipate From bottom up 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 Enhancement of the greenhouse effect by the fog cloud 19 20 21 22 23 24 25 26 27 Winter fog in the Central Valley region of California is mainly due to Radiational Cooling On a cold winter morning the most likely place for radiation fog to form is In a valley The fog that forms along the Pacific coastline of North America is mainly which type Advection Fog Fog that forms off the coast of Newfoundland is mainly a form of Advection Fog 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 Converging Rising If fog is forming at Denver Colorado and the wind is blowing from the east then the fog is most likely Upslope Fog Exhaled breath from your mouth can condense when It is very cold When you see your breath on a cold morning the air temperature Can be above or below freezing The use of helicopters to mix the air and disperse radiation fog at airports is effective provided that The fog is a shallow radiation fog with relatively low liquid water content 28 29 30 31 32 33 34 35 36 37 On a cold calm autumn morning the formation of fog above a relatively warm lake would most likely be Steam fog Which fog does not necessarily form in air that is cooling Evaporation Fog Frontal fog most commonly forms as raindrops fall into a layer of air Warm Colder Fog that most often forms as warm rain falls into a cold layer of surface air is called Evaporation Clouds are classified by their Appearance A reasonably successful method of dispersing cold fog is to Seed the fog with dried ice True False Fog is a major hazard to aviation True Which association below is NOT correct Altostratus high cloud At which city might you be able to observe cirrus clouds at an altitude of 3 000 m 0 000 feet above the surface Barrow Alaska True False Even at high elevations where cirrus clouds are found liquid water still exists in the clouds False 38 39 40 41 42 43 44 45 46 47 Which association below is not correct Altocumulus castellanus resemble little castles Which cloud is LEAST likely to produce precipitation that reaches the ground Cirrocumulous In middle latitudes which cloud will have the highest base Cirrostratus A halo around the moon means that Cirrostratus clouds are present and the clouds overhead are high clouds Which cloud type is composed of ice crystals and can cause a halo to form around the sun or moon Cirrostratus Which of the following associations is not correct Stratocumulus cloud of vertical development Light or moderate but steady precipitation is most often associated with clouds Nimbostratus In middle latitudes which cloud will have the lowest base Stratocumulus Which of the following cloud types would be found at the highest elevation above the earth s surface Cirrocumulus Which of the following pairs of cloud types could be very similar in appearance Altocumulus and cirrocumulus 48 49 50 52 53 54 55 56 Which clouds often appear in parallel waves or bands Altocumulus A mackerel sky describes what type of cloud Cirrocumulus When viewed from the surface the smallest individual cloud elements puffs are observed with which cloud Cirrocumulus 51 Cirrus clouds are composed primarily of Ice particles Detached clouds of delicate and fibrous appearance without shading usually white in color and sometimes of a silky appearance are Cirrus clouds 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 Cirrostratus At middle latitudes the base of an altostratus or altocumulus cloud would generally be found between 6500 230000 A middle cloud that sometimes forms in parallel waves or bands is Altocumulus A dim watery sun visible through a gray sheet like cloud layer is often a good indication of clouds Altostratus Clouds 57 The name given to ragged looking clouds that rapidly drift with the wind beneath a rain producing cloud is Scud 58 An anvil shaped top is most often associated with Cumulonimbus 59 60 61 If you hold your hand at arm s length and cloud elements appear to be about the size of your fist the cloud type is probably Stratocumulus The name given to a towering cloud that has NOT fully developed into a thunderstorm is Cumulus Congestus A low lumpy cloud layer that appears in rows patches or rounded masses would be classified Stratocumulus 62 Hail is usually associated with what cloud Cumulonimbus 63 The cloud with the greatest vertical growth is Cumulonimbus 64 As Apollo 2 ascended
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