Most of the highways of South America are concentrated on the ________ and connect ________
A) coast; large cities
B) mountains; mineral deposits
C) rivers; ports with indigenous tribal areas
D) plateaus; clusters of small towns
A
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Interglacial–glacial period climate cycles are often referred to as appearing saw-toothed, with an abrupt change followed by a more gradual change. When do we see an abrupt change: when going from interglacial to glacial times or when going from glacial to interglacial times? When do we see a gradual change?
Examine Figure 18.2. The Vostok ice core is 3310 m (10,860 ft) long. The full record extends back to 422,000 years before the present. The figure shows CO2 in parts per million (ppm) and temperature anomalies in Celsius degrees. What will be an ideal response?
Both sea surface (below) and air temperature (above) show a warming period beginning in
A) 1860.
B) 1940.
C) 1980.
D) 2010.
The two most abundant gasses in magmas are ____.?
a. sulfur dioxide and carbon dioxide? b. ?water vapor and oxygen c. ?oxygen and carbon dioxide d. ?methane and carbon dioxide e. ?water vapor and carbon dioxide
Blowouts are broad, shallow depressions excavated by deflation
Indicate whether the statement is true or false