Reading Comprehension: Main Idea Questions

Which of the following titles best summarizes the contents of the passage?

Excellent!

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According to our Initial Reading, both paragraphs deal with hypervelocity stars, which travel throughout their respective galaxies and are relatively rare.

Incorrect.

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The passage certainly does discuss black holes as playing an important role in propelling a galaxy into orbit; however, this information is more properly considered a supporting idea rather than the main idea of the passage.

Incorrect.

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Our Initial Reading tells us that, although this answer choice may be a good title for the second paragraph, it does not address the information regarding blue giant stars contained elsewhere in the passage.

Incorrect.

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Our Initial Reading indicates that, while this answer choice may be a good title for the first paragraph, it fails to encompass the newly discovered, and very different type of hypervelocity stars discussed in the second paragraph.

Incorrect.

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The passage does discuss the relative speeds of the two types of hypervelocity stars, but this answer choice is too narrow insofar as it does not account for other characteristics of the two types of hypervelocity stars that are compared in the passage.

Hypervelocity Stars: How Fast Is Fast?
Blue Giants: Faster Than Gravity Is Strong
The New Hypervelocity Stars: Smaller, Faster, Lighter
Black Holes: Driving Galactic Motion
Hypervelocity Stars: Uncommon Galactic Travelers

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