Central Idea & Supporting Details — Practice · Grade 7 English

Chapter: Information, Media & Evidence

What this practice covers

By the end of Central Idea & Supporting Details you should be able to:

10 questions, written answer, each with a worked explanation.

Vocabulary used: central idea, supporting detail, evidence, qualification, revision.

Problem 1

Explain central idea in the assigned reading, distinguishing it from a related idea.
Answer and explanation

A main understanding an informational text develops through its details. A topic tells what a text concerns; a central idea explains a main understanding it develops. Read the title as a clue rather than the answer. The repair-log article uses a lamp as an example, but its main concern is what makes a record useful and inspectable.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 2

Explain how two different details develop the central idea.
Answer and explanation

The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 3

Evaluate this claim: “A topic or example is automatically the central idea.” Explain a correction in context.
Answer and explanation

This claim is misleading. Explain relationships among details. A symptom record and a missing-entry warning both preserve the limits of knowledge. The connection is more useful than a list of objects mentioned in the article. A central idea may include a qualification when uncertainty is central to the explanation. The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 4

Would “lamps” be an adequate central idea?
Answer and explanation

No. It is a topic or example. The central idea concerns how a traceable record supports learning and comparison while acknowledging its limits.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 5

Develop an independent response: Explain how two different details develop the central idea. Locate two useful details or choices, and explain one limit or alternative.
Answer and explanation

The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 6

Answer this transfer question: Would “lamps” be an adequate central idea? Test your answer against a second detail or a fresh sentence, explaining whether it needs qualification.
Answer and explanation

No. It is a topic or example. The central idea concerns how a traceable record supports learning and comparison while acknowledging its limits.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 7

Explain central idea in your own words and give an example from the assigned reading or a fresh sentence.
Answer and explanation

A main understanding an informational text develops through its details. The unit case offers this example to examine: The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success. Identify the wording or choice that fits the term. A different accurate example is acceptable.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 8

Explain supporting detail in your own words and give an example from the assigned reading or a fresh sentence.
Answer and explanation

Information that explains, illustrates, or qualifies an idea. The unit case offers this example to examine: The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success. Identify the wording or choice that fits the term. A different accurate example is acceptable.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 9

Correct the misleading statement “A topic or example is automatically the central idea.” and explain a detail that makes your correction necessary.
Answer and explanation

A topic tells what a text concerns; a central idea explains a main understanding it develops. Read the title as a clue rather than the answer. The repair-log article uses a lamp as an example, but its main concern is what makes a record useful and inspectable. The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

Problem 10

Correct the misleading statement “Every detail deserves equal emphasis in a summary.” and explain a detail that makes your correction necessary.
Answer and explanation

Select details that explain, illustrate, or qualify the main understanding. Separate an observation, such as a light going out, from an inferred cause. A useful record preserves this distinction so another reader can examine the reasoning rather than accept an unexplained conclusion. The distinction between a lamp’s observed symptom and its possible cause makes the record inspectable. Treating an unrecorded trial as unknown rather than a failure preserves another limit. Together these details develop the idea that useful logs show what happened and what remains uncertain, rather than merely announcing success.

Use the model to discuss reasoning after an independent attempt. A different accurate supported response can be correct; written work needs human marking.

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