Which phrase best describes the earth's average surface temperature for the past 900,000 years?

A. a steady warming trend
B. fairly steady temperatures until recently
C. long periods of cooling and warming
D. a steady cooling trend
E. fairly steady with a recent cooling trend


Answer: C

Environmental & Atmospheric Sciences

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In the current continental configuration, oceans cover ________ of the Earth's surface.

A. 71% B. 80% C. 25% D. 45%

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An isolated remnant of wave erosion is a ________

A) spit B) groin C) sea stack D) jetty

Environmental & Atmospheric Sciences

A series of laws, known collectively as __________, forced blacks and other South African minorities to relocate and imposed other discriminatory practices

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences