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31 Cards in this Set
- Front
- Back
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When air gains altitude, the air pressure (does what?)....
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drops
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When air pressure drops, the temperature of the air (does what?)....
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drops
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When the temperature of the atmospheric air drops, the relative humidity (does what?)...
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increases
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When air rises, the pressure & temperature both drop and relative humidity increases, causing a _____ to form because a a certain altitude, the air can't cold anymore water vapor.
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cloud
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The reason that low clouds are flat-bottomed is that...
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there's a certain altitude that Pressure & Temperature, & Relative Humidity are just right for cloud formation.
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The reason that air rises on the western slopes of U.S. mountains is....
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the air must rise to get over rthe mountains.
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The eastern slopes of U.S. mountains are typically in the ___ ____, having drier conditions than the western slopes.
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rain shadow
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When air rises on the western slopes of US mountains, P & T drop, RH rises, clouds form and it _____ a lot.
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precipitates (rains, snows)
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Most winds in the U. S. blow from ____ to _____.
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west to east
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When there's a large amount of + & - charges between clouds and the ground, then it is likely that ____ will occur.
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lightning
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When lightning strikes, it causes air molecules to ____ and form nitrogen oxides which mix with rainwater and falls to ground as ____ for plants.
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explodes
fertilizer |
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When lightning explodes air molecules, ____ is released from all points of the strike, causing a long period of rumbling.
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thunder
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After seeing a lightning strike, then every ____ seconds that it takes to hear the thunder is another mile.
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5
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____ is formed when a rainsdrop is lifted up in strong _____ numerous times to the top of the cloud where it's so scold that it freezes extra layers of ice.
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Hail
updrafts |
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The larger a hail stone is, the stronger the updraft ____ are in the storm.
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winds
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Raindrops start-out high in a cloud as ______ and when they fall through warmer air, they melt into raindrops.
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snowflakes
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Thunderstorms are often triggered when a ____ front lifts ___,___ air and thus forms the thundercloud
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cold
warm, moist |
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The combination of updrafts and downdraft wind can trigger very high speed destructive vortices called....
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tornadoes
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Thunderstorms that move from NW Africa over warm water and get huge as they mover NW are called ......
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hurricanes
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Hurricanes get their energy from the warm equatorial _____, which get heat directly from the sun.
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waters
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When seawater evaporates, it warms the air causing it to ____ more readily.
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rise
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When warm, moist sea air rises, its pressure _____, temperature ____, relative humidity ____, triggering cloud and rain formation.
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drops
drops increases |
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Water must _____ heat in order to evaporate.
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absorb
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When raindrops form in a hurricane, ____ is released to the surrounding air.
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heat
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When water vapor turns back into liquid water, ____ is released.
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heat
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When rain forms, releasing heat, the surrounding air is warmed, causing the air to ______________.
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rise faster & faster
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When air rises rapidly, air rushes in rapidly from ____ areas -- what we call wind.
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adjacent (side)
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Rising air creates ___ pressure.
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low
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The tendency of air to move in a curved path instead of a straight line, because of the spinning of the earth, is called the ....
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Coriolis effect
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Dry, cool sinking air is associated with ____ pressure.
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High
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If there is a hi pressure beside a low pressure, then there will be wind created that moves from ___ pressure to ____ pressure.
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Hi to low
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