The fundamental unit in the hierarchy of time units; part of geologic time during which the rocks
of a system were deposited:a.
formation d. series
b. biozone e. nonconformity
c. period
C
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The economy of Turkmenistan rests largely on what energy export?
A) oil B) natural gas C) uranium D) coal E) hydropower
In humid regions of low relief, lakes can form _____
a. below a perched water table b. at cones of depression c. where infiltration to the subsurface is high d. at swallow holes e. where the water table intersects the ground surface
Which of the following statements about airflow in the middle and upper troposphere is true?
A) The predominant flow is easterly in the midlatitudes and westerly in the tropics. B) The flow is west-to-east throughout the midlatitudes. C) The flow is predominantly from the poles toward the equator. D) The predominant flow is from the equator poleward.
Fact: The Arctic latitudes are warming, which has released methane (a greenhouse gas) from thawing Arctic permafrost. This has increased the rate of warming in the Arctic. Systems analysis would label this as ________
A) an open system B) a closed system C) a negative feedback loop D) a positive feedback loop E) an equilibrium condition