Questions of the TOEFL iBT Reading Comprehension Practice Test 009

 

Question 1. According to the paragraph, what is dark matter thought to be made of?
A) Ordinary matter
B) Electromagnetic radiation
C) Undiscovered subatomic particles
D) A form of energy known as dark energy

Question 2. According to the paragraph, what is the primary evidence for the existence of dark matter?
A) Direct observations of dark matter particles
B) Calculations showing that many galaxies would behave differently without unseen matter
C) Observations of the cosmic microwave background
D) Modifications of the standard laws of general relativity

Question 3. According to the paragraph, which of the following is NOT true about dark matter?
A) It appears to interact with the electromagnetic field
B) It constitutes 85% of the total mass
C) It is composed of weakly interacting massive particles
D) It is composed of baryonic matter

Question 4. The author mentions all of the following EXCEPT
A) Dark matter constitutes 85% of the total mass
B) Dark energy and dark matter constitute 95% of the total mass-energy content
C) Dark matter is composed of baryonic matter
D) The scientific community generally accepts dark matter's existence

Question 5. Which of the following can be inferred from the paragraph about dark matter?
A) Dark matter can be directly observed.
B) Dark matter has been discovered through experiments.
C) Dark matter is a form of energy.
D) Dark matter interacts only through gravity.

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."
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.
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.
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.
Dark matter has been directly observed by scientists.
Dark matter is the only type of matter in the universe.
Dark matter is a type of energy rather than matter.