Set 5: Command of Evidence (Intermediate)
Explanation
PASSAGE
The greenhouse effect: atmospheric gases trap heat from the sun. Without it, Earth would average -18°C. Enhanced greenhouse effect from human emissions causes global warming.
What is the natural greenhouse effect?
Detailed Explanation
This question requires you to identify evidence that supports a claim. 'Without it, Earth would average -18°C' = it keeps Earth warm. The best evidence directly and explicitly supports the stated claim without requiring assumptions. Match specific textual details or data points to the claim being made. The correct answer provides clear, direct support. Strong evidence directly addresses the claim without requiring additional interpretation. When evaluating options, look for quotes or data that explicitly support the statement. Weak evidence may be tangentially related but doesn't provide direct proof.
Key Evidence:
• "The greenhouse effect: atmospheric gases trap heat from the sun"
• "Without it, Earth would average -18°C"
Why others are wrong: A (This option is incorrect.), C (This option is incorrect.), D (This option is incorrect.).