The Atmosphere: An Introduction to Meteorology - Chapter 8

8.1 An air mass is an immense body of air, which has little horizontal variation in: Pressure and density Moisture and winds Temperature and moisture Density and mass Moisture and pressure 8.1 An air mass is an immense body of air, which has little horizontal variation in: Pressure and density Moisture and winds Temperature and moisture Density and mass Moisture and pressure 8.2 The typical size of an air mass is: At most a few kilometers across Between 100 and 200 km across Around 1000 km across At least 1600 km across 8.2 The typical size of an air mass is: At most a few kilometers across Between 100 and 200 km across Around 1000 km across At least 1600 km across 8.3 The amount of time it takes for an air mass to pass over an area is typically: Minutes Hours Days Weeks Months 8.3 The amount of time it takes for an air mass to pass over an area is typically: Minutes Hours Days Weeks Months 8.4 An air-mass source region: Is characterized by a general stagnation of atmospheric circulation Exists in winter but not in summer Is most common in middle latitudes May consist of both land and water Is best typified by the central United States 8.4 An air-mass source region: Is characterized by a general stagnation of atmospheric circulation Exists in winter but not in summer Is most common in middle latitudes May consist of both land and water Is best typified by the central United States 8.5 Which of the following would LEAST likely be an air-mass source region? Subtropical regions Middle latitude regions Equatorial regions Polar regions 8.5 Which of the following would LEAST likely be an air-mass source region? Subtropical regions Middle latitude regions Equatorial regions Polar regions 8.6 Which of the following air-mass types is NOT typically found on Earth? mT cP mA cT mP 8.6 Which of the following air-mass types is NOT typically found on Earth? mT cP mA cT mP 8.7 Air-mass modification may occur because of: Warming from below Cooling from below Addition of moisture Vertical movements All of the above. 8.7 Air-mass modification may occur because of: Warming from below Cooling from below Addition of moisture Vertical movements All of the above. 8.8 What does the lowercase letter k indicate about an air mass? The air mass is drier than the surface over which it is passing. The air mass is colder than the surface over which it is passing. The air mass is warmer than the surface over which it is passing. The air mass is wetter than the surface over which it is passing. 8.8 What does the lowercase letter k indicate about an air mass? The air mass is drier than the surface over which it is passing. The air mass is colder than the surface over which it is passing. The air mass is warmer than the surface over which it is passing. The air mass is wetter than the surface over which it is passing. 8.9 Air-mass modifications produced by cyclones or topography rather than temperatures are called: Mechanical modifications Thermal modifications Synoptic modifications Micromodifications 8.9 Air-mass modifications produced by cyclones or topography rather than temperatures are called: Mechanical modifications Thermal modifications Synoptic modifications Micromodifications 8.10 Which of the following would be the coldest air mass? Maritime tropical Maritime polar Continental tropical Continental polar Continental arctic 8.10 Which of the following would be the coldest air mass? Maritime tropical Maritime polar Continental tropical Continental polar Continental arctic 8.11 The air mass that typically forms over central Canada would be classified as: mT mP cT cP mA 8.11 The air mass that typically forms over central Canada would be classified as: mT mP cT cP mA 8.12 Lake-effect snow near the North American Great Lakes is associated with the _______ air mass. mP cT mT cP mE 8.12 Lake-effect snow near the North American Great Lakes is associated with the _______ air mass. mP cT mT cP mE 8.13 An mP air mass is: Cold and dry Cold and humid Warm and dry Warm and humid 8.13 An mP air mass is: Cold and dry Cold and humid Warm and dry Warm and humid 8.14 A deviation from expected weather conditions is called a(n): Nor’easter Air-mass modification Anomaly Isohyet Lake-effect 8.14 A deviation from expected weather conditions is called a(n): Nor’easter Air-mass modification Anomaly Isohyet Lake-effect 8.15 Which air mass is unstable in the winter but stable in the summer? cP mT mP cT 8.15 Which air mass is unstable in the winter but stable in the summer? cP mT mP cT 8.16 Which of the following air-mass types is most likely to influence the southeastern United States in the summer? mT cP mP cA cT 8.16 Which of the following air-mass types is most likely to influence the southeastern United States in the summer? mT cP mP cA cT 8.17 Which of the following air-mass types would most likely be associated with thunderstorms? cA mT cP cT mP 8.17 Which of the following air-mass types would most likely be associated with thunderstorms? cA mT cP cT mP 8.18 Which of the following are lines connecting places having equal rainfall amounts? Isobars Isothermals Isolines Isohyets Isomers 8.18 Which of the following are lines connecting places having equal rainfall amounts? Isobars Isothermals Isolines Isohyets Isomers 8.19 In North America, the _______ air mass forms only in the summer. mP cT mT cP mE 8.19 In North America, the _______ air mass forms only in the summer. mP cT mT cP mE 8.20 A nor’easter is associated with a wintertime invasion of what air from the Atlantic? mT mP cA cP cT 8.20 A nor’easter is associated with a wintertime invasion of what air from the Atlantic? mT mP cA cP cT 8.21 The air mass most likely to be responsible for a Siberian Express is: cP cA mP cT mT 8.21 The air mass most likely to be responsible for a Siberian Express is: cP cA mP cT mT