Set 5: Command of Evidence
Explanation
PASSAGE
Black holes are regions of space where gravity is so strong that nothing, not even light, can escape. They form when massive stars collapse at the end of their life cycle. Despite their name, black holes cannot be seen directly; their presence is inferred from effects on nearby matter.
How do scientists detect black holes, according to the text?
Detailed Explanation
This question requires you to identify evidence that supports a claim. The text states their 'presence is inferred from effects on nearby matter.' 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:
• "inferred from effects on nearby matter"
Why others are wrong: A (They 'cannot be seen directly'; no light escapes.), B (This option is incorrect.), C (Nothing can escape; probes are impossible.).