|
The university's once _____ department of economic history has lost prestige and transmogrified into a department of management and marketing.
|
|
According to the passage, which of the following occurs as a result of cooling in the upper layers of the ocean?
|
|
Hotter and more massive than the Sun, stars called "stragglers" are puzzling to astronomers because such rapidly burning stars would not be expected to persist in ancient star clusters. Some researchers believe that the typical blue stragglers formed when two ancient, lower-mass stars collide and merge form more massive, hotter star. Peter Leonard theorizes alternatively that in low density globular clusters, where mergers between single stars occur too infrequently to account for the observed quantity of blue stragglers, these stragglers are created instead by a group of stars. He suggests that a pair of stars already orbiting each other presents a larger target for a third star or another pair. Once this new grouping forms, close encounters between the stars could prompt any two to merge as a blue straggler. Leonard's model predicts that each blue straggler has a distant orbiting companion-as appears true of many blue stragglers in the M67 cluster of the Milky Way galaxy.
|
|
The reference to a “larger target” serves primarily to suggest why a
|
|
Information presented in the passage suggests which of the following about blue stragglers?
|
|
The passage cites which of the following as evidence undermining the theory presented in the second sentence?
|
