In which of these settings would a river or lake lose water to groundwater?
A. where a river flows across an area where the water table is far beneath the surface
B. where the water table adjacent to the river is higher than the river
C. where a lake is directly underlain by an impermeable layer
D. None of these.
Answer: A
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The electric force between a pair of charges is strongest when the charges are
A. close together. B. far apart. C. either of these D. none of the above
Although water vapor accounts for about 60% of the atmospheric greenhouse effect, it is the increase of ____ in the atmosphere that appears to be the main cause of global warming
A) carbon monoxide B) ozone C) carbon dioxide D) argon
Atoms and molecules are always
A) moving. B) still, unless they are forming a chemical bond. C) changing. D) appearing and disappearing.
The primary motivation to develop the new renewable energy sources comes from ________
A) those who believe conservation is important B) those who believe fossil fuel dependence is suicide because it makes us vulnerable to the Middle East C) concerns that oxygen production by trees is endangered by fossil fuel use D) concerns over diminishing fossil fuel supplies and negative environmental impacts of fossil fuel use E) those who believe human health is impacted by smog and pollution