Carbon dioxide is an important variable gas because:
A) it is widely distributed throughout the atmosphere.
B) it is a "greenhouse" gas.
C) it has been increasing steadily since the early 900s.
D) all of the above
Answer: D
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Planar projections ________
A) all have their meridians at right angles to each other B) are projected from the globe to a plane C) usually show both hemispheres D) is tangent to the globe at one point E) do not have any distortions
Which force causes the wind to blow?
A. frictional force B. Coriolis force C. pressure gradient force D. centripetal force
Calculation of resisting and driving moments is most applicable to:
a. slumps b. rock slides c. debris flows d. topples
The global fish harvest was around 100 million tons in 1990 and grew to almost 180 million tons in 2010. This growth of the global fish harvest has mostly been due to increases in ________
A) volumes of the major rivers of the world B) ocean temperature C) the use of aquaculture D) saltwater capture fisheries