A substance most commonly emits heat energy by the process of
A. radiation.
B. convection.
C. conduction.
D. none of the above
Answer: A
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The darkest zone of the sea is the
a. euphotic zone b. abyssal zone c. bathyal zone d. coastal zone e. benthic zone
Ground water can seep out at the surface
A) when the water table is low because the land surface is low. B) when the water table intersects the ground surface. C) when the water table is high because the land surface is high. D) when runoff enters the channel during and shortly after rainfall.
The stages of the epidemiologic transition are based on
A) causes of death at varying stages of the demographic transition. B) the means through which disease is transmitted spatially. C) non-contagious diseases such as heart disease, obesity, or diabetes. D) new food sources which produced population explosions. E) pandemics like the bubonic plague, influenza, or AIDS.
Despite the global economic downturn, Sub-Saharan Africa's economic growth of 5 percent annually in the past two decades was twice its pace in the previous two decades, placing it among the world's fastest growing regions
a. True b. False Indicate whether the statement is true or false