ISAT Reading Comprehension: Main Idea 2 — Questions and Answers
Question 1: A passage opens: 'Urban gardens have transformed vacant lots into productive green spaces, reduced local food insecurity, and strengthened community bonds across dozens of cities.' What is the main idea?
- Urban gardens address multiple community needs simultaneously. (Correct answer)
- Vacant lots are a serious problem in cities.
- Community bonds are the most important goal of urban gardens.
- Food insecurity is worse in urban areas than rural ones.
Correct answer: Urban gardens address multiple community needs simultaneously.
The sentence presents three benefits of urban gardens, all supporting the idea that they serve multiple community purposes.
Question 2: Which type of statement most commonly expresses the main idea of an informational passage?
- A broad claim that the supporting details reinforce (Correct answer)
- A specific statistic that opens the passage
- A question posed to the reader
- An anecdote about a single individual
Correct answer: A broad claim that the supporting details reinforce
The main idea is typically a broad, general claim that the passage's details, examples, and evidence are all designed to support.
Question 3: A student reads a passage about coral reef decline and summarizes it as 'Coral reefs are pretty.' The teacher says this misses the main idea. Why?
- It is too vague and does not reflect the passage's specific argument about decline. (Correct answer)
- It focuses on the wrong organism.
- It is grammatically incomplete.
- It contradicts the author's tone.
Correct answer: It is too vague and does not reflect the passage's specific argument about decline.
A main idea summary must capture the central argument, not just a general quality; 'coral reefs are pretty' ignores the passage's focus on decline.
Question 4: A passage spends four paragraphs detailing how social media affects sleep, mood, academic performance, and self-esteem in teenagers. The best main idea statement is:
- Social media negatively affects multiple aspects of teenage wellbeing. (Correct answer)
- Teenagers use social media too much.
- Sleep is the most important factor in teenage health.
- Self-esteem problems are common among young people.
Correct answer: Social media negatively affects multiple aspects of teenage wellbeing.
The main idea encompasses all four areas the passage covers, tying them together under the umbrella of teenage wellbeing.
Question 5: The title of a passage is 'The Hidden Costs of Fast Fashion.' After reading, a student finds the passage discusses environmental damage, labor exploitation, and consumer waste. Which main idea best fits?
- Fast fashion imposes significant environmental, social, and economic costs. (Correct answer)
- Fast fashion is cheaper than traditional clothing.
- Consumers should buy more expensive clothes.
- Labor laws protect workers in the fashion industry.
Correct answer: Fast fashion imposes significant environmental, social, and economic costs.
The main idea reflects all three cost categories the passage explores and aligns with the title's framing of 'hidden costs.'
Question 6: In a persuasive passage, the author writes: 'While opponents cite economic costs, renewable energy investment ultimately saves money, creates jobs, and protects the environment.' What is the main idea?
- Renewable energy is beneficial despite its perceived economic drawbacks. (Correct answer)
- Economic concerns make renewable energy impractical.
- Job creation is the primary benefit of renewable energy.
- Environmental protection outweighs all other factors.
Correct answer: Renewable energy is beneficial despite its perceived economic drawbacks.
The author concedes one counterargument but argues that overall benefits outweigh it, making the main idea a defense of renewable energy.
Question 7: A passage about the history of the internet concludes: 'From a military communication tool to a global marketplace for ideas, the internet has fundamentally altered human civilization.' This conclusion most likely restates the passage's:
- Main idea (Correct answer)
- Thesis counterargument
- Topic sentence of the third paragraph
- Definition of the internet
Correct answer: Main idea
Conclusions frequently restate the main idea in broader terms, synthesizing the passage's historical narrative into a single overarching claim.
ISAT Reading Comprehension: Main Idea 2
A passage opens: 'Urban gardens have transformed vacant lots into productive green spaces, reduced local food insecurity, and strengthened community bonds across dozens of cities.' What is the main idea?