Set 2: Command of Evidence (Advanced)

Explanation

Answer: A

PASSAGE

Dark energy accelerates cosmic expansion. Unlike dark matter (which has gravitational attraction), dark energy exerts negative pressure. It comprises about 68% of the universe's energy.

How does dark energy differ from dark matter?

A. Both attract matter.✓ Correct

B. Dark energy pushes apart; dark matter pulls together.

C. They are the same thing.

D. Dark energy is visible.

Detailed Explanation

This question requires you to identify evidence that supports a claim. Dark matter has 'gravitational attraction'; dark energy has 'negative pressure' (repulsion). 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:

• "Dark energy accelerates cosmic expansion"

• "Unlike dark matter (which has gravitational attraction), dark energy exerts negative pressure"

Why others are wrong: B (This option is incorrect.), C (This option is incorrect.), D (This option is incorrect.).