Set 1: Command of Evidence (Advanced)
Explanation
PASSAGE
Dark matter does not interact with electromagnetic radiation (light), making it invisible. However, its presence is inferred from its gravitational effects on visible matter, such as the rotation curves of galaxies, which spin faster than the mass of visible stars alone could explain.
What is the primary evidence used to infer the existence of dark matter?
Detailed Explanation
This question requires you to identify evidence that supports a claim. The text states its presence is inferred from 'gravitational effects... such as the rotation curves of galaxies'. 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:
• "gravitational effects"
• "rotation curves of galaxies"
Why others are wrong: A (It does not interact with light (invisible).), B (It doesn't block light (that would be interaction).), C (This option is incorrect.).