Download Weather Project - Lisle CUSD 202

5/22/2013
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is an extremely large body of air whose
properties of temperature and moisture
content (humidity), at any given altitude,
are fairly similar in any horizontal
direction.
can cover hundreds of thousands of
square miles.
there can be small variations
is the transition zone between air masses
with distinctly different properties.
The differences in density are most often
caused by temperature differences.
Separate air masses with different
humidities as well. We identify fronts by
the movement of this transition zone and
the properties that move over a
geographical location.
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Source region is the location from which
an air mass originates. Examples of
source regions include the icy
continental portions of Canada in the
winter. As a giant parcel of air moves
over this source region, the air will
acquire the characteristics of the
underlying surface. In this case, the air
will be dry
A narrow, variable band of very strong,
predominantly westerly air currents encircling
the globe several miles above the earth. A flow
of exhaust gasses from a jet engine.
A stationary front: is characterized by no
movement of the transition zone
between two air masses.
A cold front is: old air displacing warm
air.
A warm front is warm air displacing cool
air diagram. Shallow leading edge warm
air must "overrun" cold air--cold air
recedes moves slow 10.
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There are two kinds of occluded fronts
Cold occlusion-cold front catches up
with warm front. Ns, Tcu,Cb warm very
cold
Warm occlusion mostly in NW. Warm
cool mP off ocean cold cP warm
occlusion. Precipitation is similar to the
cold occlusion
Low Pressure system: The components of storms are
attracted to regions of low pressure. For this reason,
heavy precipitation and overcast conditions are
often associated with low-pressure systems. Due to
the Coriolis effect, low-pressure systems often
develop cyclonic properties: in the northern
hemisphere, winds around the system move
counterclockwise, and in the southern hemisphere
they move clockwise.
High pressure systems are associated with clear, cool
weather. Around high-pressure systems, winds flow
clockwise in the northern hemisphere,
counterclockwise in the southern hemisphere.
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There are two classifications for low
pressure systems and two for high
pressure systems.
A. Flatulence
B. Condensed air
C. A large body of air
D. The inside of Nick’s head
A. When you really have to pee
A. Stationary Front
B. Air waves from a jet
B. Your front yard
C. A band of air currents circling the globe
C. Cold Front
D. The Flinstones’ car
D. Warm Front
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A.
Earthquake
A. Low, High
B.
Hurricane
B. Hot, Cold
C.
Tsunami
C. Good, Bad
D.
Volcanic Eruption
D. Right, Left
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