Information and IdeasMediumInference from a temperature record
Information and Ideas practice question
Ice cores from a mountain glacier contain a layer of volcanic ash, and the ice just above the ash layer shows several years of unusually cold summers. The nearest volcano is 400 kilometres away. This suggests that ____
Which choice most logically completes the text?
- A. a large eruption spread ash across the region and cooled the following summers.Correct
- B. the glacier was formed by the volcano.
- C. the ash fell during a period of unusual warmth.
- D. the volcano is too far away to have affected the glacier.
Answer: A. a large eruption spread ash across the region and cooled the following summers.
Ash, then cold summers immediately above it: an eruption whose effects reached 400 km.
Why the other answers are wrong
- B. the glacier was formed by the volcano.
- Glaciers form from snow; the text doesn't suggest otherwise.
- C. the ash fell during a period of unusual warmth.
- The ice above the ash shows cold summers, not warmth.
- D. the volcano is too far away to have affected the glacier.
- The ash's presence shows the volcano did reach the glacier.
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