Rise Placement Test Identifying Main Ideas 5 — Questions and Answers
Question 1: A student reads a science article and writes: 'This article is about climate.' Her teacher says she identified the topic, not the main idea. What is the difference?
- There is no difference; topic and main idea are the same thing.
- The topic names the subject; the main idea states a specific claim or point about that subject. (Correct answer)
- The topic is always longer than the main idea.
- The main idea must include statistics to be valid.
Correct answer: The topic names the subject; the main idea states a specific claim or point about that subject.
'Climate' is just a subject label; the main idea must state what the article specifically argues or explains about climate.
Question 2: Read: 'Over the past century, life expectancy in the United States has increased by more than 30 years, due largely to improvements in medicine, sanitation, and nutrition.' Which part is the main idea?
- Life expectancy increased by 30 years.
- Medicine, sanitation, and nutrition all improved.
- U.S. life expectancy rose dramatically because of advances in medicine, sanitation, and nutrition. (Correct answer)
- Sanitation improvements are more important than medical advances.
Correct answer: U.S. life expectancy rose dramatically because of advances in medicine, sanitation, and nutrition.
The main idea combines both the outcome (longer life expectancy) and its causes (medicine, sanitation, nutrition) into one complete claim.
Question 3: Which passage uses an anecdote (brief story) to introduce a main idea?
- 'According to the CDC, 42% of adults are obese.'
- 'When Maria lost her job during the pandemic, she realized how quickly savings can disappear — a reminder that financial literacy is essential for everyone.' (Correct answer)
- 'Obesity is defined as a BMI over 30.'
- 'There are several definitions of financial literacy.'
Correct answer: 'When Maria lost her job during the pandemic, she realized how quickly savings can disappear — a reminder that financial literacy is essential for everyone.'
The passage tells a brief story about Maria and then draws a broader conclusion (financial literacy is essential), making it an anecdote-led main idea.
Question 4: An editorial argues that cities should ban single-use plastics. The body discusses ocean pollution, microplastic health risks, and available alternatives. What role does 'cities should ban single-use plastics' play?
- It is one supporting detail among many.
- It is the main idea (thesis) that all the body details support. (Correct answer)
- It is a counterargument the author eventually refutes.
- It is background information provided for context.
Correct answer: It is the main idea (thesis) that all the body details support.
In an editorial, the author's central recommendation or argument is the main idea, and all evidence supports it.
Question 5: After reading a long report, a reader wants to check her understanding of the main idea. What is the best method?
- Re-read only the charts and graphs
- Write a one-sentence summary and check whether every major section of the report relates to it (Correct answer)
- Count how many times the main topic word appears
- Look up the author's other publications
Correct answer: Write a one-sentence summary and check whether every major section of the report relates to it
A one-sentence summary that all sections connect to confirms you have correctly identified the report's main idea.
Question 6: A passage reads: 'Bees pollinate roughly one-third of the food humans eat. Without bees, many fruits, vegetables, and nuts would disappear from our diets. Bee populations are currently declining worldwide.' What is the implied conclusion the author wants the reader to draw?
- People should eat fewer fruits and vegetables.
- The decline of bee populations is a serious threat to the human food supply. (Correct answer)
- Bees are the only pollinators that matter for agriculture.
- Scientists have solved the problem of declining bee populations.
Correct answer: The decline of bee populations is a serious threat to the human food supply.
The three facts together imply that declining bees endanger the food supply, even though the author never states this directly.
Question 7: Which revision best turns a weak topic sentence into a strong main idea sentence? Original: 'This paragraph is about the American Revolution.'
- 'The American Revolution happened in the 1770s.'
- 'There are many interesting facts about the American Revolution.'
- 'The American Revolution was driven by colonists' demand for political representation and economic independence from Britain.' (Correct answer)
- 'The American Revolution is a historical event.'
Correct answer: 'The American Revolution was driven by colonists' demand for political representation and economic independence from Britain.'
Option C makes a specific, arguable claim about the causes of the Revolution, giving readers a clear point the paragraph will develop.
Rise Placement Test Identifying Main Ideas 5
A student reads a science article and writes: 'This article is about climate.' Her teacher says she identified the topic, not the main idea.
What is the difference?