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Question

Difficulty: MediumOpening and Concluding Sentences

The following sentences are from a paragraph about restoring historical sound recordings. Arrange the sentences in the most logical order to create a cohesive paragraph that begins with the most effective introduction and ends with the most effective conclusion.

  1. 1For over a century, archivists struggled to play damaged or fragile historical audio recordings, such as early wax cylinders, because physical needles would destroy the soft media.
  2. 2To solve this problem, physicists developed the IRENE system, which uses high-resolution digital cameras to create three-dimensional optical scans of the grooves.
  3. 3A computer program then analyzes these digital images to reconstruct the sound wave, effectively playing the recording with light instead of a physical stylus.
  4. 4Consequently, this non-invasive technology has successfully resurrected thousands of fragile voices from the past without risking any physical damage to the original artifacts.

Answer

The logical order of the paragraph begins with the introduction of the archivist's dilemma with fragile media, followed by the introduction of the optical scanning solution, then the explanation of how the computer reconstructs the sound, and finally the concluding statement about the overall impact of this non-invasive technology.
The correct order begins by establishing the central historical challenge (the fragility of wax cylinders and other recordings), introduces the digital camera solution (the IRENE system), details how the software converts the digital images back into sound waves, and concludes with a summary of the technology's overall impact on historical preservation.

Step-by-Step Solution

1
Identify the most effective opening sentence.
The sentence about archivists struggling to play damaged historical recordings because of physical needles is the only one that introduces a general topic and sets up a problem without relying on prior context.
An effective introduction must establish the subject matter and provide the context necessary for the rest of the paragraph to make sense.
2
Determine the logical flow of the body sentences.
The sentence about the IRENE system must follow because it begins with 'To solve this problem,' referring directly to the needles destroying the soft media. The sentence about the computer program analyzing the images must come next, as it explains the subsequent step of how the scans are converted back into sound waves.
Cohesive paragraphs maintain a clear, step-by-step logical progression where each sentence builds directly on the information presented in the preceding one.
3
Identify the most effective concluding sentence.
The sentence beginning with 'Consequently' summarizes the ultimate success and significance of this technology, closing the loop on the initial problem of preserving fragile recordings without damaging them.
An effective conclusion uses transitional elements to signal the end of the discussion and summarizes the main point or impact of the paragraph.

Key Concept

Identifying the logical flow of a paragraph by determining which sentence serves as the best introduction to establish the topic and which sentence serves as the best conclusion to summarize the main point.
Estimated Time:1m 30s
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Topics

Opening and Concluding Sentences

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