West B Test Reading: Main Idea and Details 4 — Questions and Answers
Question 1: A passage about the Mediterranean diet explains that it emphasizes fruits, vegetables, whole grains, olive oil, and fish. It also notes lower rates of heart disease and cognitive decline in Mediterranean populations. The main idea is:
- Olive oil is the key ingredient in Mediterranean cooking
- People in Mediterranean countries rarely develop heart disease
- The Mediterranean diet is associated with significant health benefits (Correct answer)
- Eating fish reduces the risk of cognitive decline
Correct answer: The Mediterranean diet is associated with significant health benefits
All details—the foods emphasized and the health outcomes—point to the diet's overall health benefits as the main idea.
Question 2: After reading a passage, a student summarizes it as: 'Water pollution is caused by industrial waste.' The passage actually discusses industrial waste, agricultural runoff, and plastic debris as causes. The student's summary:
- Correctly identifies the main idea
- Is too broad
- Is too narrow — it misses important supporting details (Correct answer)
- Accurately captures all supporting details
Correct answer: Is too narrow — it misses important supporting details
The summary is too narrow because it names only one of three causes, omitting agricultural runoff and plastic debris.
Question 3: Which sentence is an example of a stated main idea (topic sentence)?
- For example, in 2023, wildfires burned over 2 million acres in Canada.
- However, some scientists remain skeptical of these findings.
- Renewable energy sources offer a promising solution to the global energy crisis. (Correct answer)
- Wind turbines can generate electricity even on cloudy days.
Correct answer: Renewable energy sources offer a promising solution to the global energy crisis.
Option C makes a broad claim about renewable energy that other details would logically support, making it a topic sentence.
Question 4: A paragraph about Abraham Lincoln includes: his log-cabin birthplace, self-education through borrowed books, and rise from poverty to the presidency. The implied main idea is:
- Lincoln was born in a log cabin in Kentucky
- Lincoln read many books throughout his life
- Lincoln's life illustrates that humble origins do not prevent great achievement (Correct answer)
- The presidency is accessible to people from all backgrounds
Correct answer: Lincoln's life illustrates that humble origins do not prevent great achievement
The three details about poverty, self-education, and eventual presidency together imply a rags-to-greatness theme.
Question 5: A passage contains the following sentences. Which is MOST likely the main idea sentence? (A) 'Studies show a 12% increase in test scores.' (B) 'For instance, schools in Finland begin instruction at age seven.' (C) 'Delaying the start of formal schooling may improve long-term academic outcomes.' (D) 'Children develop language skills rapidly between ages three and five.'
- A
- B
- C (Correct answer)
- D
Correct answer: C
Sentence C makes a broad, arguable claim that the other sentences could support as evidence.
Question 6: A reader encounters a passage with five paragraphs. Each paragraph discusses a different challenge facing public schools: underfunding, overcrowding, teacher shortages, outdated materials, and unequal access to technology. The main idea of the entire passage is likely:
- Teacher shortages are the most critical problem in public education
- Public schools face a wide range of serious challenges (Correct answer)
- Outdated textbooks disadvantage students in the modern world
- Unequal technology access creates disparities among students
Correct answer: Public schools face a wide range of serious challenges
Because the passage covers five distinct challenges, the unifying main idea must be broad enough to encompass all of them.
Question 7: A paragraph ends with: 'All of these factors demonstrate that urban farming can play a meaningful role in addressing food insecurity.' This sentence most likely functions as:
- A supporting detail
- A transitional sentence introducing the next paragraph
- A concluding sentence that restates the main idea (Correct answer)
- An irrelevant digression
Correct answer: A concluding sentence that restates the main idea
A sentence at the end of a paragraph that synthesizes prior details and states the central point is a concluding main-idea statement.
West B Test Reading: Main Idea and Details 4
A passage about the Mediterranean diet explains that it emphasizes fruits, vegetables, whole grains, olive oil, and fish.
It also notes lower rates of heart disease and cognitive decline in Mediterranean populations.
The main idea is: