Name
Date
Air Masses
Class
Chapter 14 Lesson 4
Understanding Main Ideas
Fill in the blanks in the table below.
Type of Air Mass
Where It Forms
Temperature
Humidity
1.
Over ocean
Warm
Moist
Maritime polar
2.
Cold
Moist
Continental tropical
Over land
3.
Dry
Continental polar
Over land
Cold
4.
Building Vocabulary
Write a definition for each of these terms on the lines below.
5. air mass
6. front
7. jet stream
8. occluded front
9. cyclone
10. anticyclone
Name
Date
Air Masses
Class
Chapter 14 Lesson 4
Write the letter of the correct answer on the line at the left.
1. ___ Maritime polar air masses are
A cold and dry
B cold and moist
C warm and dry
D warm and moist
2. ___ A stalled front that may bring many
days of clouds and precipitation is a(n)
A cold front
B occluded front
C stationary front
D warm front
3. ___ An air mass that forms over Arizona
and New Mexico will be a(n)
A continental polar air mass
B continental tropical air mass
C maritime polar air mass
D maritime tropical air mass
4. ___ Bands of high-speed winds about
10 kilometers above Earth’s surface are
called
A air masses
B cyclones
C fronts
D jet streams
Fill in the blank to complete each statement.
5. A large body of air that has similar temperature, humidity, and air pressure at a given height is called
a(n) _____________.
6. Air masses that form over oceans are called _____________ air masses.
7. The boundary where air masses meet is a(n) _____________.
8. A(n) _____________ front occurs when a fast-moving warm air mass overtakes a slower-moving cold
air mass.
9. A swirling center of low air pressure is called a(n) _____________.
10. _____________ are high-pressure centers of dry air.