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Answer: DSet 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?
A. It emits a faint green glow.
B. It blocks light from distant stars.
C. Its gravitational pull affects how galaxies rotate.
D. It collides frequently with Earth's atmosphere.✓ Correct
Detailed Explanation
The text states its presence is inferred from 'gravitational effects. .. such as the rotation curves of galaxies'.
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).), D (Not mentioned.).