Question 6. Why does the author mention the primary candidate for dark matter?
A) To describe the process of detecting dark matter.
B) To explain the characteristics of dark matter.
C) To argue against the existence of dark matter.
D) To provide an explanation for dark matter's presence in the universe.
Question 7. The word "hypothetical" in the passage is closest in meaning to
A) proven
B) imagined
C) tested
D) explained
Question 8. The phrase "strong influence" in the passage is closest in meaning to
A) significant effect
B) weak impact
C) minor contribution
D) no effect
Question 9. Look at the four letters – (A), (B), (C), and (D), – that indicate where the following sentence can be added to the passage. "The observations of gravitational lensing and the cosmic microwave background also support the existence of dark matter." Where would the sentence best fit?
(A)
(B)
(C)
(D)
Question 10. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage."The Solar System is a complex and vast system of the Sun and the objects that orbit it."
A) Dark matter is a hypothetical form of matter that constitutes 85% of the universe's total mass-energy content and is thought to be abundant in the universe.
B) The primary evidence for dark matter comes from calculations showing that many galaxies would behave differently if they did not contain a large amount of unseen matter.
C) Dark matter is believed to be non-baryonic and composed of some as-yet-undiscovered subatomic particles, with weakly interacting massive particles being the primary candidate.
D) Dark matter has been directly observed by scientists.
E) Dark matter is the only type of matter in the universe.
F) Dark matter is a type of energy rather than matter.