Nelson-Denny Reading Test Reading Comprehension: Identifying Main Ideas 5 — Questions and Answers
Question 1: A passage reads: 'The Renaissance was not simply an artistic movement — it was a fundamental shift in how Europeans understood humanity, science, and their place in the universe.' Where is the main idea located in this passage?
- It is implied and must be inferred from supporting paragraphs.
- It is stated in this opening sentence. (Correct answer)
- It appears only in the concluding paragraph.
- It is embedded in the transitional sentences.
Correct answer: It is stated in this opening sentence.
This sentence directly states the central claim about the Renaissance as a broad intellectual shift, making it an explicit topic sentence.
Question 2: A passage describes how a single species of fungus can decompose fallen trees, recycle nutrients into soil, and form symbiotic relationships with plant roots. What is the main idea?
- Fungi are more important than plants in forest ecosystems.
- This fungus species plays multiple critical roles in forest health. (Correct answer)
- Decomposition is the primary function of all fungi.
- Symbiotic relationships are rare in nature.
Correct answer: This fungus species plays multiple critical roles in forest health.
The passage highlights several roles the fungus plays, and the main idea unifies them as collectively critical to the forest.
Question 3: A test-taker reads a passage and selects the answer 'The author believes technology has changed society.' A classmate says this answer is too vague. Who is correct, and why?
- The test-taker is correct; broad answers are always best for main idea questions.
- The classmate is correct; the main idea should be specific enough to distinguish this passage from any other passage about technology. (Correct answer)
- Both are wrong; main idea answers should be one word.
- The classmate is wrong if the passage is about technology and society.
Correct answer: The classmate is correct; the main idea should be specific enough to distinguish this passage from any other passage about technology.
A valid main idea must be specific enough to capture what this particular passage argues, not just a generic topic statement.
Question 4: A passage about the Moon covers its formation from a planetary collision, its effect on Earth's tides, its role in stabilizing Earth's axial tilt, and the history of lunar exploration. The main idea is best stated as:
- The Moon was formed from debris after a collision with a proto-planet.
- Lunar exploration revealed important facts about the solar system.
- The Moon has profoundly shaped Earth's physical environment and human history. (Correct answer)
- Without the Moon, Earth's tides would not exist.
Correct answer: The Moon has profoundly shaped Earth's physical environment and human history.
Only option C encompasses all four topics — formation, tidal effects, axial stability, and exploration — under one unifying idea.
Question 5: After reading a long passage, you notice that paragraphs 1, 3, and 5 all support the same point, while paragraph 2 provides a counterargument. The main idea of the passage is most likely:
- The counterargument presented in paragraph 2.
- A combination of all five paragraphs with equal weight given to each.
- The point supported by paragraphs 1, 3, and 5, with paragraph 2 as a concession. (Correct answer)
- Whichever paragraph is longest.
Correct answer: The point supported by paragraphs 1, 3, and 5, with paragraph 2 as a concession.
The main idea is the point that receives the most development; a single counterargument paragraph is a concession, not the central claim.
Question 6: A passage concludes: 'Taken together, declining voter turnout, rising political polarization, and distrust of institutions signal a crisis in democratic participation.' This concluding sentence serves as:
- A new supporting detail introduced at the end
- A restatement of the main idea that synthesizes the passage's evidence (Correct answer)
- A counterargument to the passage's thesis
- Background information for the reader
Correct answer: A restatement of the main idea that synthesizes the passage's evidence
Concluding sentences that use phrases like 'taken together' synthesize prior evidence into a restatement of the main idea.
Question 7: A passage is titled 'The Hidden Costs of Fast Fashion' and discusses water pollution, labor exploitation, textile waste, and consumer behavior. Which answer best states the main idea?
- Consumers buy too many clothes each year.
- Fast fashion is an environmentally and ethically costly industry despite its low prices. (Correct answer)
- Water pollution from textile dyes is the most serious environmental problem today.
- Labor exploitation occurs in many industries, not just fashion.
Correct answer: Fast fashion is an environmentally and ethically costly industry despite its low prices.
Only option B captures the full scope of the passage — environmental, ethical, and economic costs — as signaled by the title and all four topics.
Nelson-Denny Reading Test Reading Comprehension: Identifying Main Ideas 5
A passage reads: 'The Renaissance was not simply an artistic movement — it was a fundamental shift in how Europeans understood humanity, science, and their place in the universe.' Where is the main idea located in this passage?