Sat practice Test #5 Answer Explanations



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QUESTION 26 
Choice C is the best answer
. The passage makes it clear that while both conventional and organic 
farming need nitrogen for plant growth, conventional farming uses synthetic fertilizers and organic does 
not: “Conventional agriculture makes use of 171 million metric tons of synthetic fertilizer each year, and 
all that nitrogen enables much faster plant growth than the slower release of nitrogen from the compost 
or cover crops used in organic farming” (lines 61-65).
Choice A is incorrect because the passage does not state that conventional and organic farming are 
equally sustainable and does state that organic farming needs “more land” to produce “fewer crops” 
(lines 42-43) but does not indicate that it always requires dramatically more land. Choice B is incorrect 
because the passage does not state that organic farming uses artificial chemicals. Choice D is incorrect 
because the passage mentions nitrogen runoff only as a product of conventional farming, not organic 
farming, and does not indicate that only the nitrogen in conventional fertilizers is dangerous. 
QUESTION 27 
Choice D is the best answer
. The previous question asks about the relationship between conventional 
agriculture and organic farming, with the answer being that unlike organic farms, conventional farms 
use synthetic fertilizers. This is supported in lines 61-65: “Conventional agriculture makes use of 171 
million metric tons of synthetic fertilizer each year, and all that nitrogen enables much faster plant 
growth than the slower release of nitrogen from the compost or cover crops used in organic farming.” 
Choices A, B, and C are incorrect because the lines cited do not support the answer to the previous 
question about the relationship between conventional and organic farming, instead describing the 
efficiency only of conventional agriculture (choice A), discussing one perceived positive aspect of 
conventional agriculture (choice B), and highlighting a drawback of organic farming (choice C). 

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