The exoskeleton of an arthropod is composed of ____
a. silica
b. cellulose
c. cartilage
d. calcified bone
e. chitin
e
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In the second wave of internal voluntary migration within the United States, African-Americans moved from the
A) Frostbelt to the Sunbelt. B) rural South to cities. C) eastern cities to rural areas in the West. D) rural South to New York City and Boston.
The use of nuclear power throughout the world is generally
A) uneven, ranging from 0 to 74%, depending on the country. B) uneven, ranging from 3 to 22% in different countries around the world. C) consistent, with most developed countries generating most of the electricity with nuclear power. D) steadily declining, with most countries planning on phasing out their nuclear plants.
The accumulation of salts in the soil through evaporation is called:
A) saltation B) exaltation C) salinization D) saline solution
Which of the following is the most useful measure of water vapor in the air?
A) mixing ratio B) air pressure C) temperature D) dew point E) relative humidity