31111 31111
Instructor: Prof. Seiberling
MET 1010
Name (print, last ¯rst):
PHYSICS DEPARTMENT
2nd Midterm
Signature:
On my honor, I have neither given nor received unauthorized aid on this examination.
October 22, 2001
YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE.
DIRECTIONS
(1) Code your test number on your answer sheet (use 76{80 for the 5-digit number) . Code your name on your answer sheet.
DARKEN CIRCLES COMPLETELY . Code your student number on your answer sheet.
(2) Print your name on this sheet and sign it also.
(3) Do all scratch work anywhere on this exam that you like. At the end of the test, this exam printout is to be turned in.
No credit will be given without both answer sheet and printout with scratch work most questions demand.
(4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink . Do not make any stray marks or the answer sheet may not read properly.
(5) The answers are rounded o®. Choose the closest to exact. There is no penalty for guessing.
>>>>>>>> WHEN YOU FINISH <<<<<<<<
Hand in the answer sheet separately.
There are 32 multiple choice questions. Clearly circle the one best answer for each question. If more than one answer is marked, no credit will be given for that question, even if one of the marked answers is correct. Guessing an answer is better than leaving it blank. All questions are worth 3 points each, except for four questions, which are worth 4 points each. The points for each 4-point question are indicated by each problem. Good Luck!
1. The westerly winds blow in the Southern Hemisphere because
(1) retrograde (from the east) in the winter, of the Antarctic High
(2) more randomly, of strong ocean currents
(3) more steadily, it is colder there
(4) more steadily, there is less land mass
(5) retrograde (from the east) in the summer, of the Antarctic High
.
2. A Chinook wind is:
(1) a warm, dry wind (2) a cool, moist wind (3) an easterly wind (4) a haboob (5) an upslope wind
3. A cloud droplet in a cloud at 10
±
C below freezing ( ¡ 10
±
C), will most likely:
(1) be supercooled
(2) freeze to form a snow pellet
(3) contain numerous ice embryos
(4) homogeneously freeze
(5) grow due to condensation of water vapor
4. (4 points) The force of a 20 knot wind is
(1) twice (2) 4 times that of a 10 knot wind.
(3) 8 times (4) the same as (5) 3 times

31111
5. Which of the following is NOT a common way that precipitation is formed in a cloud?
(1) falling ice crystals may collide and stick to other ice crystals by aggregation
(2) large cloud droplets fall through a maze of small cloud droplets, which coalesce onto the larger droplets
(3) water vapor evaporates from cloud droplets and deposits on ice crystals
(4) water vapor in a cloud condenses onto small cloud droplets at temperatures above freezing
(5) ice crystals falling through supercooled water droplets grow by accretion
31111
6. Which of the following conditions would most likely lead to an unstable atmosphere?
(1) warm air moving in aloft
(2) an in°ux of cold air near the surface
(3) daytime solar heating of the surface
(4) a subsidence inversion
(5) a radiation inversion
7. A drop of pure water and a crystal of ice are in equilibrium in a closed container maintained at 10
±
C below zero ( ¡ 10
±
C).
Which of the following statements is true?
(1) the vapor pressure around the water is greater than the vapor pressure around the ice
(2) the vapor pressure around the ice is greater than the vapor pressure around the water
(3) the vapor pressure around the water and the ice is the same
(4) the ice crystal would melt at this temperature
(5) the water drop would be frozen at this temperature
8. What is NOT true about the jet streams in the vicinity of the United States?
(1) the polar jet is westerly, and the subtropical jet is easterly
(2) the position of the jets usually changes with the seasons
(3) wind speed in the jets is often over 100 knots
(4) the subtropical jet is higher in altitude than the polar jet
(5) both jets are located in the tropopause gaps
9. ( 4 points ) Air is in a container, such as a piston with a movable lid, that maintains a constant pressure inside, while not allowing air to leave or enter. If the air starts at a temperature of 25
±
C, then is heated until the volume doubles, what is the ¯nal temperature? (Hint: Add 273 to degrees C to get degrees K.)
(1) 298
±
C (2) 348
±
C (3) 546
±
C (4) 50
±
C (5) 323
±
C
10. A monsoon wind system is:
(1) only found in India
(2) one associated with heavy rains in winter
(3) one that changes direction seasonally
(4) one associated with heavy rain almost all year
(5) the opposite of a sea breeze system
11. The wind direction is 225 ± . What is another name for this wind?
(1) a NE wind (2) a S wind (3) a NW wind (4) a N wind (5) a SW wind

31111
12. In the Northern Hemisphere, start with your back to the surface winds, then rotate left arm will point to the surface low.
by
31111 degrees, and your
(1) counter clockwise, 90 (2) counter clockwise, 30 (3) clockwise, 30 (4) don't rotate at all (5) clockwise, 90
13. A steady wind averaging 15 knots blows all day in a particular area. During the morning, the wind blows smoothly across a large ¯eld. If the noontime sun heats the ground and instability results, what happens to the vertical distribution of the wind speed?
(1) it increases on the ground and slows down aloft
(2) it slows down on the ground and increases aloft
(3) the vertical distribution does not change
(4) it slows down near the ground and stays the same aloft
(5) it increases near the ground and stays the same aloft
14. In the Southern Hemisphere, how does the wind blow around a SURFACE high pressure area?
(1) counter clockwise and inward
(2) clockwise and inward
(3) counter clockwise and outward
(4) clockwise and parallel to the isobars
(5) clockwise and outward
15. In a mercury barometer, what can be found in the top of the closed glass tube, above the mercury level?
(1) water (2) air at 1 atm (3) helium (4) air at 500 mb (5) mercury vapor
16. During La Nina conditions, winters in north Florida are:
(1) very rainy
(2) warm and dry
(3) co ol and moist
(4) cloudy and breezy
(5) winters in Florida are not a®ected by La Nina
17. The Three-Cell Model of general circulation of the atmosphere fails to correctly predict:
(1) surface easterly winds between the doldrums and the horse latitudes
(2) the polar surface high
(3) the polar front
(4) upper level westerly winds in the mid-latitudes
(5) the Intertropical convergence zone
18. The Canary Current °ows in the eastern North Atlantic Ocean o® the coast of Portugal and northern Africa. It °ows and is than the surrounding water.
(1) toward the south, cooler
(2) toward the south, warmer
(3) toward the north, cooler
(4) toward the north, warmer
(5) west to east, warmer

31111
19. The lines on a 500 mb map represent:
(1) isotachs (2) altimeters (3) sea level pressure lines (4) isobars (5) height contours
20. In the Three-Cell Model of general circulation of the atmosphere, a surface low pressure area occurs:
(1) near large land masses in January
(2) near 30
± north or south latitude
(3) near the poles
(4) throughout the mid-latitudes
(5) near the equator
31111
21. Associated with a land breeze is:
(1) a cool surface breeze from the water
(2) cloudiness over the land
(3) solar heating of the land
(4) cloudiness over the water
(5) a surface low on land
22. During El Nino conditions:
(1) the trade winds can reverse direction in the Paci¯c
(2) there is a surface high near Peru
(3) it is rainy in Indonesia
(4) water is cool o® the coast of Peru
(5) the trade winds in the Paci¯c are strong
23. In what type of atmosphere would air spontaneously rise?
(1) metastable (2) conditionally unstable (3) absolutely stable (4) absolutely unstable (5) neutrally stable
24. Cold air settles in over north Texas for several days. During this time, there is likely to develop a surface upper level .
(1) no e®ect on pressure (2) high, low (3) low, low (4) low, high (5) high, high and an
25. Which of the forces below can slow a wind down?
(1) pressure gradient force and friction
(2) friction only
(3) Coriolis and friction
(4) centripetal
(5) pressure gradient force and Coriolis
26.
For this and the following three problems , assume the dry adiabatic rate is 10 ± rate is 6
±
C/1000m and the environmental lapse rate is 7 surface are 26
±
C and 20
±
C, respectively. This atmosphere would be called:
C/1000m, the moist adiabatic
±
C/1000m. Also assume the temperature and dew point at the
(1) neutrally stable (2) absolutely stable (3) metastable (4) absolutely unstable (5) conditionally unstable

31111 31111
27. (4 points) If this surface air is forced to rise because it is being blown toward a mountain, at what height above the surface will the condensation level occur? (The dew point drops at 2 ± C/1000m)
(1) 750m (2) 500m (3) 1250m (4) 1000m (5) 1500m
28. What would the temperature of the environment be (outside of the cloud) at a height of 2000m above the surface?
(1) 12
±
C (2) 26
±
C (3) 6
±
C (4) 14
±
C (5) 20
±
C
29. (4 points) What would the temperature in the cloud be at a height of 2000 m above the surface?
(1) 26 ± C (2) 20 ± C (3) 11 ± C (4) 14 ± C (5) 16 ± C
30. Which of the following might be mistaken for hail?
(1) supercooled droplets (2) snow pellets (3) virga (4) snow grains (5) dendrites
31. In the stratosphere, the atmosphere is generally:
(1) absolutely stable (2) absolutely unstable (3) conditionally unstable (4) neutrally stable (5) metastable
32. If snow melts as it falls to earth, but refreezes before hitting the ground, it is called:
(1) snow (2) sleet (3) hail (4) freezing rain (5) graupel