ISAT Reading Comprehension: Main Idea 3 — Questions and Answers
Question 1: A passage describes how bees pollinate crops, how their declining populations threaten food supplies, and how farmers can create bee-friendly habitats. The main idea is:
- Protecting bee populations is essential to sustaining agricultural food production. (Correct answer)
- Bees are the most important insects on Earth.
- Farmers are solely responsible for environmental problems.
- Food supplies have been declining for decades.
Correct answer: Protecting bee populations is essential to sustaining agricultural food production.
All three sections of the passage connect to the central argument that bee health is critical for agriculture.
Question 2: Which question, when answered by a passage, most directly reveals the main idea?
- What is this passage ultimately arguing or explaining? (Correct answer)
- What is the first word of the passage?
- How many paragraphs does the passage have?
- What is the most interesting fact mentioned?
Correct answer: What is this passage ultimately arguing or explaining?
Asking what the passage argues or explains cuts through surface details to reveal the central point the author intends to communicate.
Question 3: A passage about exercise reads: 'Regular physical activity improves cardiovascular health, boosts mental clarity, increases lifespan, and reduces the risk of chronic diseases.' The main idea is best stated as:
- Regular exercise provides broad and significant health benefits. (Correct answer)
- Cardiovascular health is the top priority in fitness.
- Mental clarity improves with any amount of movement.
- Chronic diseases are the leading cause of death.
Correct answer: Regular exercise provides broad and significant health benefits.
The sentence lists four distinct benefits, all supporting the broad claim that exercise is comprehensively beneficial to health.
Question 4: A reader confuses a vivid example in paragraph two with the main idea of the entire passage. What error is this?
- Mistaking a supporting detail for the central argument (Correct answer)
- Identifying an irrelevant tangent
- Skipping the introduction
- Misreading the author's tone
Correct answer: Mistaking a supporting detail for the central argument
Examples, anecdotes, and statistics are supporting details that illustrate the main idea, not the main idea itself.
Question 5: Two passages both discuss climate change. Passage A argues that individual action is the key solution; Passage B argues that policy change is necessary. What do they share?
- The same topic but different main ideas (Correct answer)
- Identical main ideas expressed differently
- The same main idea and the same evidence
- No relationship to each other
Correct answer: The same topic but different main ideas
Both passages address climate change but make different central arguments about solutions, demonstrating that topic and main idea are distinct.
Question 6: A passage states in its first line: 'Despite widespread skepticism, acupuncture has demonstrated measurable benefits in pain management studies.' The rest of the passage provides study data. The main idea is:
- Research supports acupuncture's effectiveness for pain management despite doubts. (Correct answer)
- Acupuncture is better than all other pain treatments.
- Medical studies are always reliable sources of information.
- Skepticism about alternative medicine is always unjustified.
Correct answer: Research supports acupuncture's effectiveness for pain management despite doubts.
The opening claim is supported by the study data that follows, making it the main idea the passage builds a case for.
Question 7: Which of the following is NOT a reliable strategy for identifying the main idea in an ISAT reading passage?
- Choosing the answer with the most unfamiliar vocabulary (Correct answer)
- Reading the first and last paragraphs carefully
- Asking what most sentences in the passage relate to
- Looking for repeated concepts or themes
Correct answer: Choosing the answer with the most unfamiliar vocabulary
Unfamiliar vocabulary is unrelated to identifying the main idea; effective strategies involve structural and thematic analysis.
ISAT Reading Comprehension: Main Idea 3
A passage describes how bees pollinate crops, how their declining populations threaten food supplies, and how farmers can create bee-friendly habitats.
The main idea is: