The first in a series of brief videos on how to approach paired passages on the Digital SAT Reading & Writing section.
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Full text of example questions:
First example:
Text 1
Astronomer Mark Holland and colleagues examined four white dwarfs-small, dense remnants of past stars-in order to determine the composition of exoplanets that used to orbit those stars. Studying wavelengths of light in the white dwarf atmospheres, the team reported that traces of elements such as lithium and sodium support the presence of exoplanets with continental crusts similar to Earth’s.
Text 2
Past studies of white dwarf atmospheres have concluded that certain exoplanets had continental
crusts. Geologist Keith Putirka and astronomer Siyi Xu argue that those studies unduly emphasize
atmospheric traces of lithium and other individual elements as signifiers of the types of rock found on Earth. The studies don’t adequately account for different minerals made up of various ratios of those elements, and the possibility of rock types not found on Earth that contain those minerals.
Based on the texts, how would Putirka and Xu (Text 2) most likely characterize the conclusion presented in Text 1?
Second example:
Text 1
Ecologists have long wondered how thousands of microscopic phytoplankton species can live together near ocean surfaces competing for the same resources. According to conventional wisdom, one species should emerge after outcompeting the rest. So why do so many species remain? Ecologists’ many efforts to explain this phenomenon still haven’t uncovered a satisfactory explanation.
Text 2
Ecologist Michael Behrenfeld and colleagues have connected phytoplankton’s diversity to their
microscopic size. Because these organisms are so tiny, they are spaced relatively far apart from each other in ocean water and, moreover, experience that water as a relatively dense substance. This in turn makes it hard for them to move around and interact with one another. Therefore, says Behrenfeld’s team, direct competition among phytoplankton probably happens much less than previously thought.
Based on the texts, how would Behrenfeld and colleagues (Text 2) most likely respond to the “conventional wisdom” discussed in Text 1?
3 май 2023
