Information and IdeasMediumSelecting supporting evidence
Information and Ideas practice question
An urban planner claims that cities with greater tree cover experience cooler summer temperatures than cities with less.
Which finding, if true, would most directly support the planner's claim?
- A. Across fifty cities, each ten percent increase in tree cover was associated with an average July temperature about one degree lower.Correct
- B. Trees are more common in cities in the northern part of the country than in the south.
- C. Most city residents say they enjoy living near trees.
- D. Cities with more parks tend to have higher property values.
Answer: A. Across fifty cities, each ten percent increase in tree cover was associated with an average July temperature about one degree lower.
The claim links tree cover to summer temperature across cities. Choice A measures exactly that relationship, across many cities, and finds it.
Why the other answers are wrong
- B. Trees are more common in cities in the northern part of the country than in the south.
- This relates tree cover to geography, not to temperature.
- C. Most city residents say they enjoy living near trees.
- Residents' feelings say nothing about temperatures.
- D. Cities with more parks tend to have higher property values.
- Property values aren't temperatures, and parks aren't quite tree cover.
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