The merging of liquid cloud droplets by collision is called
Answer: coalescen...
Which cloud would most likely produce drizzle?
Which cloud would most likely produce drizzle?
Answer: strat...
Large raindrops fall ____than smaller raindrops, and have a ___ terminal velocity than small raindrops.
Large raindrops fall ____than smaller raindrops, and have a ___ terminal velocity than small raindrops.
Answer: faster; greater
...
Which cloud type below will only produce precipitation by the collision-coalescence process?
Which cloud type below will only produce precipitation by the collision-coalescence process?
Answer: a thick, warm cumulus clo...
Which of the following is NOT an important factor in the production of rain by the collision-coalescence process?
Which of the following is NOT an important factor in the production of rain by the collision-coalescence process?
Answer: the number of ice crystals...
Condensation onto hygroscopic nuclei is possible at relative humidities less than 100 percent due to the:
Condensation onto hygroscopic nuclei is possible at relative humidities less than 100 percent due to the:
Answer: solute effe...
Which statement below best describes the curvature effect?
Which statement below best describes the curvature effect?
Answer: even if a cloud is at 100% relative humidity, small droplets can evapora...
Which below best describes the solute effect?
Which below best describes the solute effect?
Answer: substances dissolved in a droplet can enhance or retard growth of the dropl...
Stratus clouds are typically puffy and form by convection.
Stratus clouds are typically puffy and form by convection.
Answer: fal...
Which of the following clouds are almost always composed of ice crystals?
Which of the following clouds are almost always composed of ice crystals?
Answer: cirrus clou...
Which two clouds can produce precipitation?
Which two clouds can produce precipitation?
Answer: cumulonimbus and nimbostrat...
In order to be effective, fog lamps on cars should be directed:
In order to be effective, fog lamps on cars should be directed:
Answer: slightly downwa...
Suppose two unsaturated air masses mix horizontally. The resulting mixture cannot possibly be saturated
Suppose two unsaturated air masses mix horizontally. The resulting mixture cannot possibly be saturated
Answer: fal...
Upslope fog forms because air ___ as it flows up a hill or mountain range.
Upslope fog forms because air ___ as it flows up a hill or mountain range.
Answer: coo...
Suppose two ocean currents with different temperatures are flowing next to one another. If the wind blows perpendicular to the currents, we would expect to find:
Suppose two ocean currents with different temperatures are flowing next to one another. If the wind blows perpendicular to the currents, we would expect...
Advection fog is often observed along the Pacific coast during summer, as westerly winds carry moist air toward the shore. The fog forms because the surface water near the coast is ____then surface water farther offshore.
Advection fog is often observed along the Pacific coast during summer, as westerly winds carry moist air toward the shore. The fog forms because the...
Stratus and high fog are:
Stratus and high fog are:
Answer: a uniform grayish cloud that often cover the entire sky. Resembles fog that does not reach the ground. Might...
When fog is "burning off," the cloud droplets are preventing solar radiation from reaching the ground.
When fog is "burning off," the cloud droplets are preventing solar radiation from reaching the ground.
Answer: fal...
In hilly areas, cold air typically collects:
In hilly areas, cold air typically collects:
Answer: in valle...
Radiation fog typically forms on:
Radiation fog typically forms on:
Answer: a clear winter night with a very slight bree...
On humid days, salt in saltshakers sometimes becomes moist and no longer pours out easily. The salt can be described as:
On humid days, salt in saltshakers sometimes becomes moist and no longer pours out easily. The salt can be described as:
Answer: hygroscop...
Dew, frozen dew, and frost form when the below-freezing layer of air is:
Dew, frozen dew, and frost form when the below-freezing layer of air is:
Answer: close to ground lev...
When temperatures are below freezing, the temperature to which air must be cooled in order for a phase change to occur is called the:
When temperatures are below freezing, the temperature to which air must be cooled in order for a phase change to occur is called the:
Answer: dew...
Lenticular clouds typically form___a mountain range.
Lenticular clouds typically form___a mountain range.
Answer: ov...
A rotating-beam ceilometer is useful for
A rotating-beam ceilometer is useful for
Answer: estimating the altitude of the tops of vertical development clou...
The TRMM (Tropical Rainfall Measuring Mission) satellite provides information on tropical:
The TRMM (Tropical Rainfall Measuring Mission) satellite provides information on tropical:
Answer: rainfall, sea surface temperatures with a...
If a cloud appears white on a visible satellite image and gray on an infrared image, then the cloud could be:
If a cloud appears white on a visible satellite image and gray on an infrared image, then the cloud could be:
Answer: a low clo...
Satellite images taken of clouds at night use:
Satellite images taken of clouds at night use:
Answer: radiomete...
Infrared satellite images are computer enhanced to:
Infrared satellite images are computer enhanced to:
Answer: increase the contrast between specific features in the pictu...
On an infrared satellite image, low, warm clouds appear ___ and high, cold clouds appear ___
On an infrared satellite image, low, warm clouds appear ___ and high, cold clouds appear ___
Answer: dark; lig...
Infrared and visible satellite images might provide
Infrared and visible satellite images might provide
Answer: a way of determining cloud thickness and altitu...
Which of the following would provide the most accurate method of determining cloud base altitude?
Which of the following would provide the most accurate method of determining cloud base altitude?
Answer: ceilomet...
If a pilot balloon rises at a rate of 100 m per minute, and if it disappears into a deck of stratus clouds 1,500 m (5,000 ft) thick in 5 minutes, what is the ceiling of the cloud layer?
If a pilot balloon rises at a rate of 100 m per minute, and if it disappears into a deck of stratus clouds 1,500 m (5,000 ft) thick in 5 minutes, what...
Which of the following can be used to determine the height of cloud bases?
Which of the following can be used to determine the height of cloud bases?
Answer: ceiling balloons, rotating-beam ceilometer, fixed-beam ce...
When clouds are viewed near the horizon, the individual cloud elements usually:
When clouds are viewed near the horizon, the individual cloud elements usually:
Answer: appear closer together than is actually the ca...
Which term below describes a situation in which clouds cover between one-tenth and five-tenths of the sky?
Which term below describes a situation in which clouds cover between one-tenth and five-tenths of the sky?
Answer: scatter...
"Luminous night clouds" are also called
"Luminous night clouds" are also called
Answer: noctilucent clo...
Another name for a "mother of pearl" cloud is:
Another name for a "mother of pearl" cloud is:
Answer: Nacreous clou...
An altocumulus in the form of parallel waves would be described as an altocumulus
An altocumulus in the form of parallel waves would be described as an altocumulus
Answer: undulat...
Clouds that appear as bag-like sacks hanging from beneath a cloud are:
Clouds that appear as bag-like sacks hanging from beneath a cloud are:
Answer: mammat...
Clouds that have a characteristic lens-shaped appearance are referred to as (a):
Clouds that have a characteristic lens-shaped appearance are referred to as (a):
Answer: lenticular clou...
The cloud-like streamer often seen forming behind an aircraft flying at high altitude is called (a):
The cloud-like streamer often seen forming behind an aircraft flying at high altitude is called (a):
Answer: contra...
The small, smooth cloud that may form just above the top of a towering cumulus cloud is called (a):
The small, smooth cloud that may form just above the top of a towering cumulus cloud is called (a):
Answer: pileus clo...
Which below is not a way in which a contrail may form?
Which below is not a way in which a contrail may form?
Answer: due to heating of the air by the engine exhau...
Which cloud forms in descending air?
Which cloud forms in descending air?
Answer: Mammatus clou...
As Apollo 12 ascended into the atmosphere, the height of the surrounding clouds was noted to be 42,000 feet. A lightning stroke was seen within these clouds, indicating that they must have been:
As Apollo 12 ascended into the atmosphere, the height of the surrounding clouds was noted to be 42,000 feet. A lightning stroke was seen within these...
The cloud with the greatest vertical growth is:
The cloud with the greatest vertical growth is:
Answer: cumulonimb...
Hail is usually associated with what cloud?
Hail is usually associated with what cloud?
Answer: cumulonimb...
A low, lumpy cloud layer that appears in rows, patches, or rounded masses would be classified:
A low, lumpy cloud layer that appears in rows, patches, or rounded masses would be classified:
Answer: stratocumul...
The name given to a towering cloud that has NOT fully developed into a thunderstorm is:
The name given to a towering cloud that has NOT fully developed into a thunderstorm is:
Answer: cumulus congest...
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:
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:
Answer: strat...
An anvil-shaped top is most often associated with:
An anvil-shaped top is most often associated with:
Answer: cumulonimb...
The name given to ragged-looking clouds that rapidly drift with the wind beneath a rain-producing cloud is
The name given to ragged-looking clouds that rapidly drift with the wind beneath a rain-producing cloud is
Answer: scu...
A dim, "watery" sun visible through a gray sheet-like cloud layer is often a good indication of ____ clouds
A dim, "watery" sun visible through a gray sheet-like cloud layer is often a good indication of ____ clouds
Answer: altostrat...
A middle cloud that sometimes forms in parallel waves or bands is:
A middle cloud that sometimes forms in parallel waves or bands is:
Answer: altocumul...
At middle latitudes, the base of an altostratus or altocumulus cloud would generally be found between
At middle latitudes, the base of an altostratus or altocumulus cloud would generally be found between
Answer: 6500 and 23000 fe...
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
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...
Detached clouds of delicate and fibrous appearance, without shading, usually white in color and sometimes of a silky appearance are
Detached clouds of delicate and fibrous appearance, without shading, usually white in color and sometimes of a silky appearance are
Answer: cirrus...
Cirrus clouds are composed primarily of
Cirrus clouds are composed primarily of
Answer: ice particl...
When viewed from the surface, the smallest individual cloud elements (puffs) are observed with which cloud?
When viewed from the surface, the smallest individual cloud elements (puffs) are observed with which cloud?
Answer: cirrocumul...
A "mackerel sky" describes what type of cloud?
A "mackerel sky" describes what type of cloud?
Answer: cirrocumul...
Which clouds often appear in parallel waves or bands?
Which clouds often appear in parallel waves or bands?
Answer: altocumul...
Which of the following pairs of cloud types could be very similar in appearance?
Which of the following pairs of cloud types could be very similar in appearance?
Answer: altocumulus and cirrocumul...
Which of the following cloud types would be found at the highest elevation above the earth's surface?
Which of the following cloud types would be found at the highest elevation above the earth's surface?
Answer: cirrocumul...
In middle latitudes, which cloud will have the lowest base?
In middle latitudes, which cloud will have the lowest base?
Answer: stratocumul...
Light or moderate-but-steady precipitation is most often associated with ___clouds.
Light or moderate-but-steady precipitation is most often associated with ___clouds.
Answer: nimbostrat...
Which cloud type is composed of ice crystals and can cause a halo to form around the sun or moon?
Which cloud type is composed of ice crystals and can cause a halo to form around the sun or moon?
Answer: cirrostrat...
A halo around the moon means that
A halo around the moon means that
Answer: cirrostratus clouds are present and the clouds overhead are high clou...
In middle latitudes, which cloud will have the highest base?
In middle latitudes, which cloud will have the highest base?
Answer: cirrostrat...
Which cloud is LEAST likely to produce precipitation that reaches the ground?
Which cloud is LEAST likely to produce precipitation that reaches the ground?
Answer: cirrocumul...
Even at high elevations where cirrus clouds are found, liquid water still exists in the clouds.
Even at high elevations where cirrus clouds are found, liquid water still exists in the clouds.
Answer: fal...
At which city might you be able to observe cirrus clouds at an altitude of 3,000 m (0,000 feet) above the surface?
At which city might you be able to observe cirrus clouds at an altitude of 3,000 m (0,000 feet) above the surface?
Answer: Barrow, Alas...
A reasonably successful method of dispersing cold fog is to
A reasonably successful method of dispersing cold fog is to
Answer: seed the fog with dry i...
Clouds are classified by their
Clouds are classified by their
Answer: appearan...
Fog that most often forms as warm rain falls into a cold layer of surface air is called
Fog that most often forms as warm rain falls into a cold layer of surface air is called
Answer: evaporati...
Frontal fog most commonly forms as ___ raindrops fall into a layer of ____ air.
Frontal fog most commonly forms as ___ raindrops fall into a layer of ____ air.
Answer: warm; cold...
Which fog does not necessarily form in air that is cooling?
Which fog does not necessarily form in air that is cooling?
Answer: evaporation f...
On a cold, calm autumn morning, the formation of fog above a relatively warm lake would most likely be
On a cold, calm autumn morning, the formation of fog above a relatively warm lake would most likely be
Answer: steam f...
The use of helicopters to mix the air and disperse radiation fog at airports is effective provided that
The use of helicopters to mix the air and disperse radiation fog at airports is effective provided that
Answer: the fog is a shallow radiation...
When you see your breath on a cold morning, the air temperature
When you see your breath on a cold morning, the air temperature
Answer: can be above or below freezi...
Exhaled breath from your mouth can condense when
Exhaled breath from your mouth can condense when
Answer: it is very co...
If fog is forming at Denver, Colorado, and the wind is blowing from the east, then the fog is most likely
If fog is forming at Denver, Colorado, and the wind is blowing from the east, then the fog is most likely
Answer: upslope f...
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.
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.
Answer: converging;...
Fog that forms off the coast of Newfoundland is mainly a form of
Fog that forms off the coast of Newfoundland is mainly a form of
Answer: advection f...
The fog that forms along the Pacific coastline of North America is mainly which type?
The fog that forms along the Pacific coastline of North America is mainly which type?
Answer: advection f...
On a cold, winter morning, the most likely place for radiation fog to form is:
On a cold, winter morning, the most likely place for radiation fog to form is:
Answer: in a vall...
Winter fog in the Central Valley region of California is mainly due to:
Winter fog in the Central Valley region of California is mainly due to:
Answer: radiational cooli...
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:
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...
When radiation fog "burns off", the fog tends to dissipate:
When radiation fog "burns off", the fog tends to dissipate:
Answer: from bottom ...
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 ____ that forms in cleaner air.
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 ____ that forms in cleaner...
Wet haze forms when the relative humidity is:
Wet haze forms when the relative humidity is:
Answer: less than 10...
Under what circumstances could the relative humidity exceed 00 percent without producing fog?
Under what circumstances could the relative humidity exceed 00 percent without producing fog?
Answer: there are no condensation nuclei prese...
Condensation nuclei are important in the atmosphere because:
Condensation nuclei are important in the atmosphere because:
Answer: without them, condensation would not occur easily in atmosphe...
Condensation nuclei may be:
Condensation nuclei may be:
Answer: particles of du...
Frost typically forms on the inside of a windowpane (rather than the outside) because:
Frost typically forms on the inside of a windowpane (rather than the outside) because:
Answer: there is more water vapor touching the inside...
On a humid day, ________causes salty potato chips left outside in an uncovered bowl to turn soggy.
On a humid day, ________causes salty potato chips left outside in an uncovered bowl to turn soggy.
Answer: the attraction of water by hygroscopic...
Particles that serve as surfaces on which water vapor may condense are called
Particles that serve as surfaces on which water vapor may condense are called
Answer: condensation nucl...
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
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...
The cooling of the ground to produce dew is mainly the result of
The cooling of the ground to produce dew is mainly the result of
Answer: radiational cooli...
The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is
The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is
Answer: frozen d...
Dew is most likely to form on
Dew is most likely to form on
Answer: nights that are clear and calm than on nights that are cloudy and win...
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