____________________ refers to the formation of life from non-living matter. Fill in the blank(s) with the appropriate word(s)
Abiogenesis
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Which of the following nations has the lowest percentage of urban dwellers?
A) Mexico
B) Uruguay
C) Guatemala
D) Chile
E) Argentina
Although the polar regions radiate away more heat energy than they receive by insulation in the course of a year, what prevents them from becoming progressively colder each year?
A. circulation of heat by the atmosphere and oceans B. release of latent heat to the atmosphere when polar ice melts C. conduction of heat through the interior of the Earth D. concentration of Earth's magnetic field lines at the poles
In addition to limestone, evaporites like ____ and ____ can create underground cavities
a. ?smectite; salt b. ?smectite; gypsum c. ?permafrost; smectite d. ?gypsum; karst e. ?salt; gypsum
Which of the following spheres is not part of the climate system?
A) Cryosphere B) Asthenosphere C) Hydrosphere D) Biosphere