A "London-type" smog is characterized by:
A) low humidity and high levels of industrial pollution.
B) the combination of smoke and fog on very humid days.
C) the photochemical production of pollutants.
D) high concentrations of fine particulate matter on sunny days.
B
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How does the water bound in glaciers eventually reenter the hydrologic cycle? What will be an ideal response?
What must be true of a rock unit that is cut by an igneous intrusion?
A. The rock unit is younger than the intrusion. B. The rock unit is the same age as the intrusion. C. The rock unit is older than the intrusion.
The North American population cluster is much like the European region in that much of the population is concentrated:
A. in rural areas B. in river valleys C. in mountain valleys D. in several major cities E. in arable, agricultural areas
The wind cells that form at either side of the equator are the ________ cells
A) Equatorial B) Polar C) Ferrel D) Hadley E) Convergent