ACT Science Practice Question #1483 (Medium (32)) | Test Citadel
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ACT Science Difficulty: Medium (32)

Digital ACT Science Practice Question #1483

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Two paleontologists debate the primary cause of the Cretaceous-Paleogene (K-Pg) mass extinction: Paleontologist 1 asserts that an asteroid impact 66 million years ago was the sole trigger, citing the global iridium layer and shocked quartz crystals at the Chicxulub crater. Paleontologist 2 contends that extensive volcanism in the Deccan Traps released catastrophic levels of sulfur dioxide and carbon dioxide, causing severe climate oscillation before the impact occurred. Which of the following discoveries, if confirmed, would provide the strongest support for Paleontologist 2 over Paleontologist 1?
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Paleontologist 2 focuses on pre-impact volcanic decline.

Masterclass Solution & Distractor Trap Analysis

Paleontologist 2 argues that volcanic activity triggered extinction before the impact. Population decline 300,000 years before the impact directly supports Paleontologist 2....

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

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