CELSA Reading For Main Ideas 3 — Questions and Answers
Question 1: Which of the following is the BEST definition of a main idea in a reading passage?
- The first sentence of every paragraph
- The most interesting fact in the passage
- The central point the author wants to communicate (Correct answer)
- The longest sentence in the passage
Correct answer: The central point the author wants to communicate
The main idea is the core message or central point the author intends to convey through the entire passage.
Question 2: A passage about nutrition states: 'Vitamins C and D are important. Iron prevents anemia. Calcium strengthens bones. A balanced diet provides all essential nutrients.' What is the main idea?
- Calcium strengthens bones
- Iron prevents anemia
- A balanced diet supplies all essential nutrients (Correct answer)
- Vitamin C is the most important nutrient
Correct answer: A balanced diet supplies all essential nutrients
The final sentence summarizes all the preceding details, making it the main idea that a balanced diet covers all nutritional needs.
Question 3: A passage extensively discusses causes of the 2008 financial crisis including risky lending, poor regulation, and global interconnection. The main idea is BEST stated as:
- Banks lent money irresponsibly
- Regulation of banks has always been weak
- The 2008 financial crisis resulted from multiple systemic failures (Correct answer)
- Global trade caused the recession
Correct answer: The 2008 financial crisis resulted from multiple systemic failures
The passage covers multiple contributing causes, so the main idea must be broad enough to include all of them as a systemic problem.
Question 4: A paragraph about a scientific study gives background, methodology, findings, and implications. Which element most directly expresses the main idea?
- The background information
- The research findings and what they mean (Correct answer)
- The names of the researchers
- The sample size used
Correct answer: The research findings and what they mean
The findings and their implications represent what the study ultimately concluded and communicated — making them the core of the main idea.
Question 5: A passage titled 'The Rise of Telemedicine' discusses patient convenience, doctor availability, rural access, and cost savings. A reader should conclude that the main idea is:
- Telemedicine is only useful in rural areas
- Telemedicine is replacing all in-person care
- Telemedicine offers broad advantages to both patients and providers (Correct answer)
- Technology in medicine is controversial
Correct answer: Telemedicine offers broad advantages to both patients and providers
The passage highlights multiple benefits — convenience, access, cost — pointing to the overall main idea that telemedicine has wide-ranging advantages.
Question 6: To distinguish the main idea from a supporting detail, a reader should ask:
- Is this sentence the longest?
- Does this point prove or explain the main claim, or IS it the main claim? (Correct answer)
- Was this mentioned more than twice?
- Is this sentence at the beginning?
Correct answer: Does this point prove or explain the main claim, or IS it the main claim?
The key test is whether a sentence is explaining or proving something broader — if so, it's a detail; if everything else explains it, it's the main idea.
Question 7: A passage includes the sentence: 'Renewable energy sources reduce emissions, lower long-term costs, and create jobs.' This sentence is followed by statistics on each benefit. This sentence functions as:
- A transition
- A counterargument to be refuted
- The main idea / topic sentence (Correct answer)
- A concluding thought
Correct answer: The main idea / topic sentence
A sentence that previews multiple supporting points and is followed by data validating each point is functioning as the topic sentence or main idea.
CELSA Reading For Main Ideas 3
Which of the following is the BEST definition of a main idea in a reading passage?