The downtilt of a rock layer is described by its ____
a. dip
b. syncline
c. strike
d. anticline
a
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The success of emissions trading programs in limiting pollution depends primarily on
A. the size of the initial cap only. B. how often the cap is lowered only. C. the size of the cap and how often it is lowered. D. the danger of the pollutant being limited. E. the participation of local airports.
Buses and cars using fuel cells are
A) not yet possible because the technology to safely store hydrogen is still not resolved. B) not yet available because the fuel cell generates unsafe levels of heat. C) still inefficient, mostly because the fuel cells are large and heavy. D) already in use and ready for commercial production.
The Heat Island Effect of a city, in which the people, buildings, factories, and vehicles in a city give off heat, while simultaneously dark surfaces of buildings and roadways absorb solar energy and release it slowly at night, creating a pocket of
hot air above the city, could be reduced by A) confining most automobile use to daylight hours. B) confining most automobile use and heat-generating industrial activity to nighttime hours. C) creating more urban parks and forests. D) decreasing the albedo of building surfaces.
The major bombardment period that shaped much of the surface of the moon ended ________
A) 5.0 billion years ago B) 3.8 billion years ago C) 2.2 billion years ago D) 767 million years ago