Central Ideas and Details sample question 1

Her way of teaching relied on observation and experience rather than written instructions.

Central Ideas and Details sample question 2

She took on key responsibilities for the project after her husband became ill.

Central Ideas and Details sample question 3

Its atoms hold electrons tightly, weakening the bonds between atoms.

Central Ideas and Details sample question 4

After avoiding her late father's workbench, Teodora uses it again and finds that a habit she shares with him makes the space feel like hers too.

Central Ideas and Details sample question 5

Watching the heron's stillness calms the speaker's many concerns, even though she has not actually worked through any of them.

SAT · Reading and Writing · Information and Ideas

Central Ideas and Details

Central Ideas and Details is part of Information and Ideas in the SAT Reading and Writing section. The questions below are written in the style of the real test, each with the answer and a worked explanation.

Question types you will see here include main idea of a science text, what a fiction excerpt conveys, detail question: according to the text and what a study found.

Common traps: detail that is true but too narrow; claim broader than the text supports; reversed relationship.

Sample questions

Central Ideas and Details
The following text is adapted from an original essay. My grandmother never wrote down a recipe. She cooked by smell, by the sound of onions in oil, by the feel of dough between her fingers. When I asked her for measurements, she laughed and told me to watch. It took me years to understand that she was not being unhelpful. She was teaching me the only way she knew.
Question 1
Based on the text, what does the narrator come to understand about the grandmother?
- A.
  She did not want the narrator to learn to cook.
- B.
  She had forgotten her recipes.
- C.
  Her way of teaching relied on observation and experience rather than written instructions.
- D.
  She preferred baking to cooking.
Answer: C. Her way of teaching relied on observation and experience rather than written instructions.
The narrator realizes the grandmother taught through watching and sensing, "the only way she knew."
Question 2
According to the text, what role did Emily Warren Roebling play in building the Brooklyn Bridge?
- A.
  She took on key responsibilities for the project after her husband became ill.
- B.
  She designed the bridge before construction began.
- C.
  She opposed the construction of the bridge.
- D.
  She hired John Roebling as chief engineer.
Answer: A. She took on key responsibilities for the project after her husband became ill.
The text states she studied engineering, relayed instructions, and managed much of the project after Washington fell ill.
Question 3
According to the text, why is mercury liquid at room temperature?
- A.
  It contains iron and copper.
- B.
  It is heated by the surrounding air.
- C.
  It is not actually a metal.
- D.
  Its atoms hold electrons tightly, weakening the bonds between atoms.
Answer: D. Its atoms hold electrons tightly, weakening the bonds between atoms.
The text explains that tightly held electrons weaken bonds between atoms, lowering mercury's melting point.
Question 4
Which choice best states the main idea of the text?
- A.
  After avoiding her late father's workbench, Teodora discovers that he arranged his tools there in a way that shows he expected her to take over.
- B.
  After struggling to repair a clock at her father's workbench, Teodora succeeds only once she recalls the specific methods he taught her.
- C.
  After avoiding her late father's workbench, Teodora uses it again and finds that a habit she shares with him makes the space feel like hers too.
- D.
  After returning to her late father's workbench, Teodora decides that his tools should be left exactly where he placed them in his memory.
Answer: C. After avoiding her late father's workbench, Teodora uses it again and finds that a habit she shares with him makes the space feel like hers too.
The text moves from Teodora's three months of avoiding the bench to the moment she notices she is humming her father's tune, ending with the bench 'no longer [feeling] like his alone,' so Choice C captures the whole arc. Choice B is tempting because she does finish the repair, but the text credits a shared habit (humming), not recalled instructions, with the change in her feelings.
Question 5
Which choice best states the main idea of the text?
- A.
  Watching the heron's stillness calms the speaker's many concerns, even though she has not actually worked through any of them.
- B.
  Watching the heron convinces the speaker that the many concerns she brought to the river were never as important as she believed.
- C.
  Watching the heron frustrates the speaker, because it distracts her from the problems she had come to the river to resolve.
- D.
  Watching the heron and the river leads the speaker to argue that stillness is a more natural state than constant motion.
Answer: A. Watching the heron's stillness calms the speaker's many concerns, even though she has not actually worked through any of them.
The speaker admits she has 'thought through none' of her 'hundred things,' yet they 'have grown quieter' as she watches the bird 'refuse to be rushed,' which is what Choice A states. Choice B overreaches: the concerns become quieter, as if 'waiting,' but the speaker never judges them unimportant; Choice C misreads her admission as frustration, which the calm tone does not support.

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