SAT Reading and Writing Practice Question #771 (Hard (800)) | Test Citadel
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SAT Reading and Writing Difficulty: Hard (800)

Digital SAT Reading and Writing Practice Question #771

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

In paleoclimatology, the ratio of Carbon-13 to Carbon-12 isotopes found in the calcium carbonate shells of marine foraminifera serves as a vital proxy for historical ocean temperatures. Because Carbon-13 is heavier than Carbon-12, it requires less kinetic energy to form stable chemical bonds. Consequently, thermodynamic fractionation dictates that at lower ambient temperatures, a higher proportion of Carbon-13 is incorporated into the foraminifera shells, as the thermodynamic environment favors the lower energy threshold of the heavier isotope. Which inference about foraminifera shells is most strongly supported by the text?
Select Your Answer:
Socratic AI Engine Step-by-Step Derivation
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Tactical Insight (Hint 1)

Rely strictly on explicit statements in the passage. Eliminate any option that requires external assumptions or twists the author's stated nuance.

Elimination Framework (Hint 2)

Elimination Strategy: In digital reading/writing, 3 out of 4 choices contain an active flaw (half-right/half-wrong, too extreme, or wrong transition type). Cross out options with absolute words like "always", "proves", or "never".

Masterclass Solution & Distractor Trap Analysis

Let's break this down step-by-step, like we're dissecting a high-level science journal! The passage gives us a clear cause-and-effect relationship based on temperature and isotopic ratios. We are told that because Carbon-13 is heavier, it r...

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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