In items 6-33 through 6-35, select from column B 

 the definition of each isobaric pattern in 

 column A. 



6-37. 



6-38. 



6-39. 



Isobaric 

 Patterns 



6-33. Trough 

 6-34. Ridge 

 6-35. Col 



B. Definitions 



The region between 

 two highs and two 

 lows 



The region between 

 primary and second- 

 ary fronts 



An elongated area of 

 relatively low pres- 

 sure 



An elongated area of 

 relatively high 

 pressure that 

 extends from the 

 center of an 

 anticyclone 



6-36. What are isallobars? 



1. Lines of equal pressure 



2. Lines of equal temperature 



3. Lines of equal pressure changes 



4. Lines of equal temperature changes 



What symbol and color are used to denote 

 a maritime polar air mass? 



1. mP in red 



2. mP in blue 



3. Mp in blue 



4. Mp in red 



Dashed red lines on a weather chart indi- 

 cate which of the following? 



1. Isobars for plus values 



2. Isobars for minus values 



3. Isallobars for plus values 



4. Isallobars for minus values 



A continental polar air mass that is 

 colder than the surface over which it 

 passing is denoted by 



1. cPk in blue 



2. Cpk in red 



3. cPw in blue 



4. CPw in red 



is 



In items 6-40 through 6-42, select from column B 

 the prescribed weather map coloring that shows 

 the intensity of each precipitation area listed 

 in column A. 



A. Precipitation 

 Areas 



6-40. Fog 



6-41. Intermittent 

 precipitation 



6-42. Continuous 



precipitation 



6-43. 



6-44. 



B. Colorings 



1. Light green 

 shading 



2. Light green 

 hatching 



3. Light red 

 hatching 



4. Light yellow 

 shading 



Refer to figure 11-12 in your textbook. 

 In forecasting frontal movement, which 

 symbol must you use to indicate the 

 probable path of a front and its position 

 in 12 hours? 



> 



^> 



^> 



Learning Objective: Relative to 

 upper air pressure analysis, 

 recognize the function and source 

 of information for constant pres- 

 sure charts, conditions associated 

 with pressure analysis, and symbols 

 and procedures for plotting 

 constant pressure data. 



A 700-millibar constant pressure chart 

 shows atmospheric conditions at an 

 approximate altitude of 



1. 113 m 



2. 1,463 m 



3. 3,010 m 



4. 5,578 m 



6-45. What are the wind speed and direction as 

 indicated in figure 11-14 in your text- 

 book? 



1. 55 knots from 090° 



2. 55 knots from 270° 



3. 60 knots from 097° 



4. 60 knots from 277° 



36 



