Sat practice Test #8 Answer Explanations

Choice A is the best answer. “Potent” means strong or powerful, 
which makes sense in the context of discussing greenhouse gas.
Choice B is incorrect because “sturdy” is usually used to refer to 
the physical strength or solidity of something. Choice C is incorrect 
because “influential” refers to the power of a person to affect or sway 
others or events without any apparent effort. Choice D is incorrect 
because “commanding” indicates that the inanimate greenhouse gas is 
actually commanding something.

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QUESTION 10
Choice C is the best answer. “Armed with these facts” is the most 
effective transition from the previous paragraph, which discusses 
the amounts of various substances that end up in landfills and the 
resulting methane gas that is released from the organic matter. The 
paragraph that this transition introduces goes on to discuss laws 
that some cities have instituted to control the handling of compost in 
landfills to reduce the release of methane gas.
Choices A, B, and D are incorrect because they do not offer transitions 
that indicate a connection between the problem identified in the 
previous paragraph—the release of dangerous methane gas from the 
compost in landfills—and the concluding paragraph that identifies 
what some cities have done to help alleviate the problem.
QUESTION 11
Choice A is the best answer. No change is needed because the 
correlative conjunctions “either” and “or” are used together to indicate 
that one choice or another should be considered. In this sentence, 
residents are encouraged to choose the option to create their own 
compost piles or to dispose of compostable materials in bins for 
collection.
Choices B, C, and D are incorrect because they do not provide the 
correlating conjunction for “either” used earlier in the sentence.
QUESTION 12