Download Meteorology Chapter 8 Worksheet 1 Name: Circle the letter that

Meteorology
Chapter 8 Worksheet 1 Name: ________________________________
Circle the letter that corresponds to the correct answer 1) When an area is experiencing several consecutive days of rather constant weather, it is experiencing: a) warm‐front weather. b) air‐mass weather. c) occluded front weather. d) cold‐front weather. 2) The usual size of an air mass is: a) at most a few kilometers across. b) between 100 and 200 km across. c) around 1000 km across. d) at least 1600 km across. 3) The two most important properties that should be relatively homogeneous at the same altitude in an air mass are: a) temperature and carbon dioxide concentration. b) vapor pressure and latitude. c) moisture content and temperature. d) relative humidity and radiation. 4) The situation where a region under the influence of an air mass has generally constant weather conditions is called: a) boundary layer weather. b) regional weather. c) air‐mass weather. 5) An air mass is a body of air with: A) very low humidity in its lower layers. a) B) very high pressure everywhere. b) C) similar values of temperature and moisture in the horizontal. c) D) at least two frontal zones. d) E) equal density throughout. 6) The typical amount of time it takes for an air mass to pass over a given area is on the order of a few: a) minutes. b) weeks. c) hours. d) months. e) days. 7) An air‐mass source region: a) is characterized by a general stagnation of atmospheric circulation. b) is best typified by the central United States. c) is generally an area characterized by a cyclonic circulation pattern. d) may consist of both land and water. 8) Which of the following criteria is NOT a characteristic of a good source region? a) It must be very large. b) It must have uniform physical features. c) The air must able to stagnate over the area for long periods of time. d) The area must frequently experience cyclones. 9) Which of the following is not a good source region for air masses? a) the Gulf of Mexico b) central Canada c) the North Pacific d) the central United States 10) Which air mass code letter is paired with the wrong word? a) c = continental b) t = temperate c) m = maritime d) a = arctic 11) Air‐mass source regions are least likely to exist in: a) subtropical regions. b) middle‐latitude regions. c) equatorial regions. d) polar regions. 12) The area where an air mass originates is called a: a) source region. b) site region. c) local region. d) large region. 13) Air mass source regions tend to be dominated by: a) converging winds. b) dry air. c) fast wind speeds. d) cyclones. e) slow moving anticyclones. 14) Characteristics of an air mass source region include: a) uniformity of temperature and moisture. b) sharp temperature contrasts. c) jet stream winds aloft. d) high elevation. 15) An air mass from the Gulf of Mexico is called: a) mP. b) cT. c) mT. d) cP. 16) An ideal source region of air masses should be: a) roughly half land, half water. b) located at or near the equator. c) physically uniform. d) small. e) located at or near a pole. 17) The cP air‐mass in North America originates in: a) the North Atlantic. b) the Arctic basin. c) Siberia. d) interior Alaska and Canada. e) Greenland. 18) Air masses are identified by a pair of letters, one lowercase and one uppercase. The uppercase letter (P, A, or T) refers to: a) average air pressure within the air mass. b) the approximate latitude of the air mass source region. c) the humidity levels within the air mass. d) the elevation of the air mass source region. 19) Compared to continental air masses with the same air temperature, maritime air masses: a) have lower water vapor content. b) have about the same water vapor content. c) have higher water vapor content. 20) A cT air mass is: a) warm and humid. b) cold and dry. c) warm and dry. d) cold and humid. 21) An mP air mass is: a) humid and cold. b) humid and warm. c) dry and warm. d) dry and cold. 22) What does the lowercase letter w indicate about an air mass? a) The air mass is drier than the surface over which it is passing. b) The air mass is colder than the surface over which it is passing. c) The air mass is warmer than the surface over which it is passing. d) The air mass is wetter than the surface over which it is passing. Circle “T” if the statement is true or “F” if the statement is false T F 23. Air masses are identified by two‐letter codes.
T F 24. An air mass is an immense body of air characterized by homogeneous temperature and moisture content. T F 25. The boundary of an air mass is a region of especially active weather. T F 26. To qualify as an air mass, a large body of air must have the same temperature at the same altitude, even T F 27. In the middle latitudes, atmospheric disturbances occur at the boundary zones separating air masses. T F 28. The majority of the continental U.S. is not an air mass source region. T F 29. The moisture content of an air mass is unrelated to its temperature. T F 30. The physical properties of an air mass are independent of its place of origin. T F 31. A region dominated by cyclones is more likely to produce an air mass than a region dominated by anticyclones. T F 32. When an air mass is warmer than the surface over which it is moving, its lower layers are chilled. T F 33. Maritime Arctic air masses do not form very often.
T F 34. Maritime air masses form over landmasses.
T F 35. Maritime air masses have a higher water vapor content than continental air masses.
Answer the following questions 36. Name two potential source regions of cT air masses. 37. The place where an air mass originates is known as the ________. 38. Name two source regions of mP air masses.