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Geography 1
Chapter 7 Worksheet
Physical Geography
1. The location of the polar front occurs where mT and cP air masses collide. Its
position greatly affects weather in the eastern half of the US.
Why is its impact less for the western portion of the US?
What type of atmospheric disturbances develop along this front?
Why does the location of the polar front change?
2. Refer to Figures 7-32 and 7-33 for the following:
Why do 90% of the world’s tornadoes occur in the United States?
Where do these tornadoes occur in the US and why?
What time of year are they most likely to occur and why?
3. If you’re experiencing an occluded front,
Will you experience any warm conditions? Why or why not?
Will you experience rainfall? Describe the intensity and duration of the rain.
Refer to the mid-latitude cyclone below to answer the following questions:
Note the following key:
B. Tulsa, OK
C. St. Louis, MO
D. Des Moines, IA
E. Detroit, MI
4. Which of the following cities is most likely to experience the greatest total
precipitation in the next day and a half?
a. Tulsa
b. Des Moines
c. Detroit
Explain your answer:
5. What location is most likely to receive thunderstorms in the next 12 hours?
a. Tulsa
b. St Louis
c. Detroit
Explain your answer:
6.
a.
b.
c.
d.
During the next 12 hours Detroit, MI should experience which of the following:
thunderstorms followed by cool weather and low humidity
steady rainfall followed by warmer weather and high humidity
clear skies followed by showers and falling temperatures
severe weather followed by clearing and cooler temperatures
7. The area experiencing the most intense rainfall currently is:
a. Central Missouri
b. West Texas
c. Washington DC
d. Michigan
8. The area with the highest pressure would be?
a. Illinois
b. Florida
c. Idaho
d. New York
Explain your answer:
9. Skies are clearest where?
a. Texas
b. Georgia
c. Wyoming d. North Carolina
Explain your answer:
10. Label the geostrophic (upper air) ridge and trough.
11. As air in the upper atompshere flows from ridge to trough it undergoes
convergence. What impact does that have on storm formation at the surface of the
Earth?
12. As air in the upper atmosphere flows from a trough to a ridge it undergoes
divergence. What impact does this have on storm formation at the surface of the
Earth?
13. Based on the map above, what portion of the US is least likely to experience
thunderstorms? Why?
14. Which area is most likely? Why?