Which of the following is typically the largest source of radiation exposure for humans?
A) artificial radiation sources
B) atmospheric radon
C) cosmic rays
D) terrestrial radiation
B
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The lower atmosphere is a homogeneous mixture of gasses with nitrogen and oxygen being the most
abundant. Indicate whether the statement is true or false.
In the first stage of the demographic transition, crude birth rate is ________ and crude death rate is ________
A) low; high B) high; low C) low; low D) high; high
Red light travels the ________ and is therefore bent the ________
A) fastest; least B) slowest; least C) fastest; most D) slowest; most
Which of the following is true of migrating centers of low pressure in the Northern Hemisphere?
A) The winds diverge from the pressure system and spiral outward in a clockwise fashion. B) These pressure systems tend to move east to west along storm tracks. C) These pressure systems are characterized by converging, ascending air that spirals inward in a counterclockwise fashion. D) They form only a minor weather pattern in the middle and higher latitudes.