An air mass moves out of its source region. Two days later, the lower layers of the air mass are found to be warmer than they were originally. What letter should be added to the end of the air mass's classification code?
A) m B) k C) w D) c
B
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Data presented as an average on a pre-existing areal unit (average income by zip code, for example) is presented as a(n) ________.
A. dot distribution map B. graduated circle map C. isopleth map D. choropleth map
The speed of mud movement depends on the slope angle and on the water content.
a. true b. false
The U.S. Department of Energy predicts that in 2040 the average American will use ________ energy as compared to today. This is primarily due to ________
A) less; global warming B) less; more energy-efficient appliances, homes, and vehicles, and migration to warmer areas C) less; shorter commute distances and more energy-efficient buildings D) more; larger homes E) less; more people working from home
According to the World Health Organization (WHO), between 1970 and 2015, the percentages of all deaths worldwide resulting from infectious diseases ____.
A. increased and then leveled off B. increased from 5% to 16% C. increased from 15% to 35% D. dropped from 35% to 16% E. dropped from 15% to 5%