Download Chapter 12 Section 7 Notes What are air masses? Name: Date: Obj

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Chapter 12 Section 7 Notes
What are air masses?
Name: _______________________________________
Date: ________________________
Objective:
Describe _______________ kinds of _______________ masses.
Air masses
❖ Air _______________ form when air _______________ over an area for a while or
moves _______________ over an area more than 1,000 km across.
➢ It is affected by the _______________ it covers
➢ Air masses that form over _______________ are _______________.
➢ Air masses that form over _______________ are _______________.
➢ Air masses that form over _______________ regions are _______________.
➢ Air masses that form over _______________ regions are _______________.
1. INFER: What is an air mass formed over the ocean in a cold region like?
____________________________________________________________________________
____________________________________________________________________________
Polar air masses
❖ Two kinds of _______________ air masses:
➢ Continental polar air masses
■
Forms over _______________
■
The United States is affected by continental polar air masses that form
over Canada.
➢ Maritime polar air masses
■
Form over _______________ in cold regions, _______________
■
The United States is affected by maritime polar air masses that form over
the northern Pacific and Atlantic oceans.
2. NAME: What is a cold, dry air mass called?
____________________________________________________________________________
____________________________________________________________________________
Tropical Air Masses
❖ Two kinds of _______________ air masses:
➢ Maritime tropical air masses
■
Form over _______________, moist and _______________
■
The United States is affected by maritime tropical air masses that form
over the oceans, the Caribbean Sea, and the Gulf of Mexico.
➢ Continental tropical air masses
■
From over _______________ land areas such as northern Mexico
■
_______________ and _______________
3. NAME: Where do warm, moist air masses in the United States form?
____________________________________________________________________________
____________________________________________________________________________
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