Craft and StructureMediumChoosing a precise noun in a geology text
Craft and Structure practice question
Each year the glacier compresses a new layer of snow, trapping ash, pollen, and air bubbles as it hardens. Drilled out as cores, the ice becomes an ____ of past climate: a readable, layer-by-layer record of eruptions and droughts reaching back a hundred thousand years.
Which choice completes the text with the most logical and precise word or phrase?
- A. archiveCorrect
- B. forecast
- C. debate
- D. boundary
Answer: A. archive
Layers that preserve a readable record of past eruptions and droughts function as a stored history — an 'archive.'
Why the other answers are wrong
- B. forecast
- The cores record the past; a 'forecast' concerns the future.
- C. debate
- The sentence describes stored information, not an argument among scientists.
- D. boundary
- 'Boundary' misses the sense of accumulated, readable history.
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What is the main purpose of the text?
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