6. which answer is the best description of an air parcel? a. air delivered to your home by the united parcel service b. the portion of an exceptionally strong thunderstorm that rises into the stratosphere c. air that is much warmer than the local climatological average temperature d. a theoretical small volume of air with uniform properties that maintains its identity as it moves through the atmosphere 7. which one of the following is not a type of severe weather that portland, or ever experiences? a. hurricanes b. wind storms c. freezing rain d. extreme heat e. extreme cold 8. severe weather can be specific to a location. for example, a temperature of 100 degrees would be considered an extreme heat event in portland, or, but it would be fairly normal during summer in phoenix, az. however, some severe weather events are severe regardless of where they occur. which of the following constitute severe weather no matter where they occur? a. tornado b. earthquake c. hurricane d. blizzard e. all are severe weather all the time f. all are severe weather all the time except for (b) 9. which one of the following is the most reasonable definition of a jet in meteorology? a. a trail of clouds left behind an aircraft at cruising altitude b. any object moving very fast through the atmosphere c. any narrow band of strong winds d. a strong cyclone 10. what choice best described the most key process for causing precipitation? a. downward vertical motion b. wind c. upward vertical motion d. hurricanes e. none of these are key for precipitation