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12.Practice.Tests.for.the.SAT_2015-2016_1128p

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Section 61<br />

Practice Test Nine 791<br />

18. The consequence of dark matter in <strong>the</strong> Milky Way<br />

was serious to astronomers because<br />

(A) <strong>the</strong>y were reluctant to accept a more general<br />

substrate of gas and dust<br />

(B) <strong>the</strong>y believed that <strong>the</strong> spaces between stars<br />

were largely empty<br />

(C) it would complicate <strong>the</strong> determination of<br />

distances of stars<br />

(D) <strong>the</strong>y would be <strong>for</strong>ced to admit <strong>the</strong>y were<br />

wrong about interstellar space<br />

(E) dark matter could not be transparent<br />

19. In line 17, "intrinsic" most nearly means<br />

(A) <strong>the</strong> appearance to <strong>the</strong> naked eye<br />

(B) complicating <strong>the</strong> determination of a star's<br />

distance<br />

( C) belonging to <strong>the</strong> essential nature of <strong>the</strong> star<br />

(D) <strong>the</strong> appearance to an astronomer<br />

(E) <strong>the</strong> brightness of a star<br />

20. The author's statement that <strong>the</strong> presence of dark<br />

matter "was a very serious obstacle <strong>for</strong> researchers"<br />

(lines 17-18) suggests that<br />

(A) dark matter would have detrimental effects<br />

on <strong>the</strong> Milky Way<br />

(B) photography would replace <strong>the</strong> need <strong>for</strong><br />

astronomers<br />

( C) astronomers would replace researchers in<br />

<strong>the</strong> scientific arena<br />

(D) dark matter would change <strong>the</strong> course of<br />

astronomical thinking<br />

(E) dark matter would make it easier to determine<br />

a star's distance<br />

21. According to <strong>the</strong> passage, <strong>the</strong> presence of a general<br />

absorption at all wavelengths is evidenced by <strong>the</strong><br />

discovery that<br />

(A) <strong>the</strong> distances given by <strong>the</strong> apparent magnitude<br />

method are always less than those given by<br />

<strong>the</strong> angular diameters<br />

(B) <strong>the</strong> distances given by <strong>the</strong> apparent magnitude<br />

method were greater than those given by<br />

angular diameters<br />

( C) dust particles are about <strong>the</strong> same size as <strong>the</strong><br />

wavelength of light<br />

(D) fainter means more distant<br />

(E) smaller means more distant<br />

22. Why does <strong>the</strong> setting sun appear red?<br />

(A) The phenomenon of elective adsorption<br />

(B) Color excess<br />

(C) The phenomenon of selective absorption<br />

(D) Interstellar dust<br />

(E) Dark matter<br />

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