Why is methane hydrate not harvested for energy use?
a. It is costly to mine and liquefy the sediments.
b. It is dangerous to mine due to methane's combustibility.
c. The methane disappears as it is brought to the surface.
d. All of these choices.
ANS: D
There are many factors working against the mining of methane hydrate. Although it is the biggest
source of hydrocarbons on the planet, it is uneconomical at this point. Methane hydrate is thought to be
responsible for some of the ancient climate change events. Information can be found in the section
Stars and Seas.
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If wastage is greater than accumulation, a glacier is said to be ____
A)advancing B)melting C)surging D)retreating E)stable
Atoms of which of the following elements are smallest?
A) Ca B) K C) Mg D) Na
The current pattern of religious affiliation in the US remains quite complex, and one can find observers of nearly every major religion, and many minor ones, in virtually every area of the country.
a. true b. false