________ is ground that remains frozen for many years.

A. Laterite
B. Moraine
C. Soil
D. Permafrost
E. Caliche


Answer: D

Environmental & Atmospheric Sciences

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During the seventeenth and eighteenth centuries, Jews living in Western Europe were required to reside in segregated communities called "ghettos."

Indicate whether the statement is true or false.

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The difference between a nature reserve and a wilderness area is that people are allowed to visit nature reserves

Indicate whether the statement is true or false

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During the winter, an air mass that moves into coastal sections of Oregon and Washington from the northwest would most likely be ____

A) mP B) mT C) cP D) cT

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The number of people who are too young or too old to work in a society compared to the number of working age people is the

A) dependency ratio. B) life expectancy. C) population pyramid. D) sex ratio. E) demographic ratio.

Environmental & Atmospheric Sciences