WEATHER CHANGES AS AIR MASSES MOVE.
SECTION
17.1 Reading Study Guide B
BIG IDEA The
interaction of air masses causes changes in weather.
KEY CONCEPT Weather
changes as air masses move.
Review
Air pressure changes with location and altitude.
Take Notes
I.
Air masses are large bodies of air.
1.
Fill in the word triangle for air mass.
2.
Describe how an air mass forms.
A. Characteristics of an Air Mass
3.
Fill in the blanks about the different types of air.
North American Air Masses
A r c ti
c C ir
maritime polar
60qN
cle
50qN
continental polar
maritime polar
maritime polar
continental polar
40qN
40qN
N
W
maritime polar
E
S
30qN
continental tropical
continental tropical
20qN
maritime tropical
maritime tropical
maritime tropical
Tropic of Cancer
110qW
100qW
90qW
80qW
70qW
158 EARTH’S ATMOSPHERE, CHAPTER 17, READING STUDY GUIDE B
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
CHAPTER 17
Weather Fronts and Storms
air mass:
4.
Fill in the chart to show characteristics of the surface where different types of
air masses form.
Tropical
Polar
Continental
Maritime
B. Movement of an Air Mass
5.
What happens to an air mass when it comes to a new region?
II. Weather changes when air masses meet.
6.
What happens at a front?
A. Fronts and Weather
Fill in the cluster diagram with the three different types of fronts.
CHAPTER 17
Weather Fronts and Storms
Copyright © by McDougal Littell, a division of Houghton Mifflin Company
7.
TYPES OF FRONTS
B. High- and Low-Pressure Systems
8.
Compare and contrast high- and low-pressure systems by completing the
chart.
High Pressure
Low Pressure
Weather
Clouds
Direction of air flow
EARTH’S ATMOSPHERE, CHAPTER 17, READING STUDY GUIDE B 159