What is not a characteristic of western boundary currents?
a. They move warm water poleward.
b. They are fast moving currents.
c. They are deep currents.
d. They are broad currents.
ANS: D
Western boundary currents are narrow, deep, and fast moving currents. They have clearly defined
boundaries. There are five large western boundary currents. Information can be found in the section
Surface Currents Are Driven by the Winds.
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What is the approximate depth of the caldera (from the rim down to the floor)?
The question is based on Map T-2, the “Umnak, Alaska,” topographic map (scale 1:250,000; contour interval 200 feet), Map T-21b, a satellite image; and Figures 35-3 and 35-4, a shaded relief map and a stereogram showing the Okmok Caldera (53°25'33"N, 168°07'38"W) on Umnak Island in the Aleutian Islands. What will be an ideal response?
The most abundant gas in Earth's atmosphere is nitrogen
a. True b. False
Which two bodies of water were connected by the construction of the Suez Canal?
A) Mediterranean Sea and Black Sea B) Persian Gulf and Red Sea C) Mediterranean Sea and Red Sea D) Black Sea and Red Sea E) Black Sea and the Persian Gulf
The type of basin shown in this figure is a
A) passive margin.
B) normal-fault basin.
C) foreland basin.
D) basin along a strike-slip fault.