University Of Arizona

ATMO 170A

QUIZ 4

1)The downdraft in an air-mass thunderstorm is created mainly by

2. Severe thunderstorms are different from air-mass thunderstorms in that severe thunderstorms

3. The leading edge of a thunderstorm's cold downdraft is known as a

4. The most likely time for an air mass thunderstorm to form is

5. Lightning discharges within a cloud occur______________ cloud-to-ground lightning.

6. In cloud-to-ground lightning, the stepped leader travels______________ and the return

stroke travels_______ _.

7. The top of a thunderstorm is normally_____________ charged, and the middle and

lower parts are_______ charged.

8. The most frequent time of day for tornadoes to form is in the

9. Which would you not expect to observe as the eye of a hurricane passes directly over your area?

10. The strongest winds in a hurricane are found

11. The air in a hurricane is______ inside the eye several kilometers above the

surface, and it is                        inside the eyewall several kilometers above the

surface.

12. The main source of energy for a hurricane is the

13. Hurricanes dissipate when

14. The strongest winds in a hurricane heading westward toward Florida would most likely be found on the_______________________________ side.

15. Along a coastline, most hurricane damage is caused by

16. An abrupt change in wind speed or wind direction with altitude is called

17. Which below is usually not true concerning a sea breeze circulation?

18.A smog front is most often associated with which wind system?

19. The winter monsoon in eastern and southern Asia is characterized by

20. Surface low pressure becomes best developed over the Asian continent in the

21.A valley breeze would develop its maximum strength

22. Upwelling is

23. In the Northern Hemisphere, ocean currents in the Atlantic and the Pacific move in a generally circular pattern. The direction of this motion is______________________________________ in

the Atlantic and________ in the Pacific.

24. Which of the following is generally not associated with a major El Nino event?

25. The reversal of positions of surface high and low pressure at opposite ends of the tropical Pacific Ocean is called

26. To be considered a mature thunderstorm, rain falling from the cloud must reach the ground.

27. Thunderstorm activity generally increases in frequency as you move from the east to the west coast of the United States.

28. Lightning is sometimes produced during snowstorms and dust storms, and by the clouds of erupting volcanoes