The area shown on this cross section will experience subsidence from groundwater withdrawal. Which of the following statements is likely to be true about the subsidence?
A) The amount of subsidence will be constant across the area.
B) The aquifer will regain its porosity once the water is replaced.
C) The subsidence can be reversed (undone) by pumping in saltwater.
D) None of these are correct.
D) None of these are correct.
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Which should be larger, the potassium atom, K, or the potassium ion, K??
A. The potassium atom and the potassium ion are exactly the same size and only differ in charge. B. The potassium ion, K?, is larger since it has an extra electron which increases its size. C. The potassium atom, K, with an additional shell of electrons is larger. D. The potassium ion, K?, is larger since charging an atom always makes it larger.
As of 2015, the gap between oil production and consumption in the United States is shifting but in the future will generally
A) stay about the same. B) widen. C) shrink. D) continue to shift without a clear pattern that seems to relate to global oil prices.
Biodiesel ________
A) can be used in vehicles with diesel engines without engine modification B) is twice as expensive as petrodiesel C) produces more pollution than petrodiesel D) is widely used in the United States E) is produced from sugarcane
The troposphere extends from the Earth up to about _______________ km
Fill in the blank with correct word.