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AIR MASSES, FRONTS & PRESSURE SYSTEMS
An ______________________________ a large body of air that
develops over a particular region.
__________________________________________form over
_____________________________regions near the equator.
They have ___________________________________________
T__________________________________________form over
_____________________________regions near the equator.
They have _____________________________________________
P___________________________________________ form over
_______________________.
m__________________________________________form over
_____________________________regions near the equator.
c-
LABEL
mPcP –
mT –
cT –
Four types of fronts and map symbols
A _________________________________________ is a
boundary between air masses.
Draw the symbol for each front in the correct
colors RED and BLUE
_________________________________ is noted by the first letter
that is lowercase.
___________________________________________________front
m –________________________________________________________
c –________________________________________________________
___________________________________________________front
_____________________________ is noted by the second letter
that is uppercase.
___________________________________________________front
___________________________________________________front
P –________________________________________________________
T –________________________________________________________
Label each front
What is a cold front? A cold front forms when a
____________________ air mass pushes
_______________________ a _________________________ air
mass.
What is a stationary front? A stationary front
forms when a
air mass and a
air mass meets but
Many days of
,
weather.
Brings __________________________, _____________________
or ___________________.
This produces ___________________________________
clouds.
Cold fronts are followed by
____________________________________________________.
What is a warm front? A warm front forms when
a
air mass moves
a
air mass.
This produces
What is an occluded front? An occluded front
forms when a ____________________________________ air
mass overtakes a
______________________ air mass.
Brings
temperatures with large
amounts of___________________________.
and clouds.
Brings
.
Followed by __________________________________.
QUIZ: WHAT HAVE YOU LEARNED ABOUT AIR
MASSES AND FRONTS?
Describe a maritime polar (mP) air mass, in terms of
moisture and temperature.
What is the name of an air mass that forms over water?
What is the name of an air mass that forms over land?
What is the name of an air mass that forms in a cold
region?
What is the name of an air mass that forms in a warm
region?
How do the air molecules circulate in a highpressure system?
AND what does it cause the air to do in terms of the
center of the system?
What is the weather map symbol for a high-pressure
system? (use your colors)
Draw, Label and Color the High Pressure System
Describe a continental tropical (cT) air mass, Moisture
and temperature.
The boundary between two air masses is called a
______________________.
A cold air mass meets and pushes a warm air mass out
of the way. What type of front am I?
A warm air mass is trapped between to cold air masses.
What type of front am I?
A warm air mass meets and pushes a cold air mass out
of the way. What type of front am I?
I am a front that brings drizzly rain and am followed by
warm clear weather. Name me.
A cold air mass meets a warm air but neither is very
strong. They are separated and many days of wet ,
cloudy weather occur. What type of front am I?
Pressure Systems
What is a low-pressure system?
In the center of a low-pressure system what happens
to the density of air?
AND what does this level of density cause the air to
do?
What is air pressure?
What kind of weather does a low-pressure system
bring?
What is a high-pressure system?
What kind of air mass has a LOW pressure?
In the center of a high-pressure system what happens
to the density of air?
How do the air molecules circulate in a highpressure system?
AND what does it cause the air to do in terms of the
center of the system?
AND what does this level of density cause the air to do?
What kind of weather does a high-pressure system
bring?
What kind of air mass has a HIGH pressure?
What is the weather map symbol for a low-pressure
system? (use your colors)
What weather instrument is used to measure air
pressure in the atmosphere?
What unit of measure is used when measuring air
pressure?
Draw, Label and Color the High Pressure System
Compare/Contrast Chart: High and Low Pressure
High
Pressure
Low Pressure
Moving inward
on isobars…
Density of air
Representation
on a map
Motion of air
Also known
as…
Motion of air
causes a zone
of…
Stability of
atmosphere
More Pictures……
On the Weather Map, Circle the High Pressure
Systems in BLUE, Circle the Low Pressure Systems in
RED.
What to types of fronts are on the Weather Map?