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Difficulty: HardTransitions: Cause and Effect

In dendrochronology, scientists use tree-ring datasets to calibrate radiocarbon dating measurements, establishing a precise timeline for historical artifacts. Because carbon-14 levels in the atmosphere have fluctuated historically rather than remaining constant, raw radiocarbon ages cannot be converted directly into calendar years. _______ archeologists must apply calibration curves to adjust these raw dates, aligning them with the real-time calendar record.

Which transition word or phrase most logically completes the blank in the passage?

  1. Thus,Answer
  2. B
    Conversely,
  3. C
    Moreover,
  4. D
    Previously,

Answer

Thus,
The transition 'Thus' correctly indicates a cause-and-effect relationship, signaling that the need to apply calibration curves is a direct consequence of the fact that raw radiocarbon dates cannot be directly converted to calendar years.

Step-by-Step Solution

1
Analyze the logical relationship between the sentences before and after the blank.
The sentence before the blank states that raw radiocarbon ages cannot be converted directly into calendar years. The sentence after the blank states that archeologists must apply calibration curves to adjust these dates.
This shows a cause-and-effect relationship: because the conversion cannot happen directly (cause), archeologists must use calibration curves (effect/solution).
2
Evaluate the transition choices for the correct logical category.
'Thus' represents cause-and-effect. 'Conversely' represents contrast. 'Moreover' represents addition. 'Previously' represents chronological order.
Matching the logical category of the words to the sentence relationship identifies the correct option.

Key Concept

Transitions: Cause and Effect
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Topics

Transitions: Cause and Effect

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