Why are air mass thunderstorms most likely to occur in the midafternoon?
A) Water-vapor contents are too low at night.
B) Upper-level winds are too fast at night and in morning.
C) Atmosphere is most unstable at that time.
D) It takes all day for them to mature.
C
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A septic system is ________
A) a rural method of handling sewage B) the use of natural wetlands to cleanse wastewater C) a toxic or badly polluted waterway D) an early version of a wastewater treatment plant E) a second level mechanism to remove bacteria at a wastewater treatment plant
Research performed by Edward O. Wilson on ____ has been applied to the study and understanding of other social organisms, including humans.
A. ants B. worms C. bees D. chimpanzees E. elephants
About 150 years ago, agriculture underwent a revolution due to
A) genetic engineering of new crops. B) the development of new herbicides and pesticides. C) the industrial revolution, which brought changes in agricultural technology. D) new markets that emerged from increased international trade.
The fact that water expands as much as 9% of its volume as it freezes is the basis of
A) oxidization. B) exfoliation. C) salt crystal growth. D) frost wedging.