PrepTest 121, Section 2, Question 19
According to the theory of gravitation, every particle(447 more words not shown)
The passage states each of(3 more words not shown)
- AThere are more(8 more words not shown)
- BObservable matter cannot(13 more words not shown)
- CScientific experiments support(5 more words not shown)
- DNeutrinos likely cannot(8 more words not shown)
- EDark matter may(10 more words not shown)
Reading the passage
Four statements are supported; we're looking for the exception. Check what each statement actually claims. Familiar language can hide a change in the comparison, as it does here.
Working the answers
- ACorrect
This initially sounds like the statement that neutrinos are much more abundant than any other single particle type (paragraph 2). But being more numerous than each other kind separately doesn't establish that they outnumber all other kinds combined.
Imagine neutrinos make up 40 percent of the particles and three other kinds make up 20 percent each. Neutrinos are the largest single group, yet non-neutrinos total 60 percent. That is the gap in A. My first reading missed it; going back after finding support for the other choices reveals the stronger claim.
- B
This is the opening problem: the observable matter doesn't supply enough mass to explain the universe's organization through gravity.
- C
The third paragraph describes the experiment that found evidence of the predicted change in neutrino type.
- D
Even the highest estimate accounts for only about 20 percent of the missing mass. That supports the limit stated here.
- E
The first paragraph proposes dark matter as supplying the gravitational force that observable matter cannot account for. This is supported, so we cannot choose it as the exception.
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