29 In astrophysics, a ring of debris orbiting a larger object within the object’s Roche limit is expected to persist as a ring, whereas a ring of debris orbiting outside this limit would likely accrete into a satellite (e.g., a moon). Bruno Morgado and colleagues, b l a n k detected a dense ring of material orbiting the trans-Neptunian object Quaoar at a distance of 2,500 miles, well outside the calculated Roche limit of 1,100 miles, that has remained intact. Which choice completes the text with the most logical transition?
Correct answer: A (parsed from the explanation — this source omits an answer key for this item)
Explanation
Choice A is the best answer. “Though” logically signals that the information in this sentence—that Morgado and colleagues detected a dense ring orbiting outside the Roche limit that remained intact—presents an exception to the previous sentence’s claim about debris orbiting outside an object’s Roche limit. Such debris would be expected to accrete into a satellite, not remain intact as a ring. Choice B is incorrect because “for example” illogically signals that the information about Morgado’s discovery exemplifies the previous sentence’s claim about debris orbiting outside an object’s Roche limit. Instead, the sentence presents an exception to the claim. Choice C is incorrect because “fittingly” illogically signals that the information about Morgado’s discovery aligns with the previous sentence’s claim about debris orbiting outside an object’s Roche limit. Instead, the sentence presents an exception to the claim. Choice D is incorrect because “likewise” illogically signals that the information about Morgado’s discovery is similar to the previous sentence’s claim about debris orbiting outside an object’s Roche limit. Instead, the sentence presents an exception to the claim.
Loading…
Searched on YouTube by topic, not by question text. Open this search on YouTube →
Extracted from PDF layout: equations, figures and tables do not survive intact. Use the original PDFs for anything the text renders poorly. SAT® is a trademark registered by the College Board, which is not affiliated with and does not endorse this project.