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Difficulty: MediumWords in Context: High-Utility Vocabulary

Historically, geologists characterized the Earth’s mantle as a largely homogenous and static layer of solid rock. However, recent high-resolution seismic imaging has ________ this traditional model, revealing complex, localized convection currents and composition gradients that indicate a far more dynamic interior.

Which choice completes the text with the most logical and precise word or phrase?

  1. challengedAnswer
  2. B
    corroborated
  3. C
    predicted
  4. D
    overlooked

Answer

challenged
The context describes a contrast between the historical view of the Earth's mantle as 'homogenous and static' and the new findings of 'complex, localized convection currents' indicating a 'far more dynamic interior.' The transition word 'However' signals this contrast. The word 'challenged' precisely fits this context because it means to dispute or call into question, reflecting how the new seismic imaging contradicts the traditional model.

Step-by-Step Solution

1
Analyze the context of the sentence and the role of the blank.
The blank requires a verb that describes the impact of new seismic imaging on the traditional model of a homogenous, static mantle.
Understanding the sentence structure and the relationship between ideas is necessary to identify the correct meaning.
2
Identify transition words and contrasting ideas.
The transition word 'However' and the description of the new findings ('complex, localized convection currents') contrast with the 'homogenous and static' traditional model.
This contrast signals that the new imaging contradicts or calls into question the traditional model, requiring a word with a similar meaning.
3
Evaluate the answer choices based on the context.
'Challenged' fits because it means to dispute, while 'corroborated' has the opposite meaning, and 'predicted' and 'overlooked' are logically inappropriate.
This eliminates the distractors and confirms the correct choice.

Key Concept

Words in Context: High-Utility Vocabulary
Estimated Time:1m 0s
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Words in Context: High-Utility Vocabulary

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