Both sea surface (below) and air temperature (above) show a warming period beginning in
A) 1860.
B) 1940.
C) 1980.
D) 2010.
C) 1980.
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During Spanish colonial times in Latin America, the social rankings from highest to lowest were
A. Peninsulares--Criollos--Mestizos B. Mestizos--Peninsulares--Criollos C. Criollos--Mestizos--Peninsulares D. Criollos--Peninsulares--Mestizos
Drawing the boundaries of voting districts so that one group has an unfair advantage is
A) apportionment. B) a census. C) gerrymandering. D) a technique used throughout Europe.
The theories of continental drift and plate tectonics rely on many pieces of physical evidence. Identify and explain three observations that led to the acceptance of the theory of plate tectonics.?
What will be an ideal response?
Polar stratospheric clouds play a role in ____
A) primary pollution B) ozone destruction C) photochemical smog D) acid rain formation