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Zorluk: KolayImplicit Main Idea

In the eighteenth century, wooden naval vessels faced constant degradation in warm tropical waters from shipworms tunneling through hull planks and thick colonies of barnacles creating severe drag. Navies experimented with lead sheets, toxic paints, and animal fat coatings, but each rapidly failed or rotted away. When British shipbuilders began fastening thin sheets of copper across the underwater hull, the metal released trace copper ions that poisoned marine larvae while maintaining a smooth outer surface. Fleets equipped with this metal layer sustained far higher sailing speeds and stayed deployed at sea for years without drydock repairs.

Which of the following best expresses the unstated main idea of the passage?

  1. A
    Copper ions released into seawater prevent marine organisms and burrowing worms from adhering to submerged wood.
  2. Sheathing wooden hulls with copper effectively solved persistent biological damage and boosted fleet operational performance.Cevap
  3. C
    Metallurgical innovations have consistently eliminated all maintenance challenges across international maritime history.
  4. D
    Eighteenth-century navies prioritized high sailing speeds above all other strategic considerations during wartime engagements.

Cevap

Sheathing wooden hulls with copper effectively solved persistent biological damage and boosted fleet operational performance.
The correct response combines all major sections of the passage: the initial issue of biological degradation on wooden vessels, the implementation of copper plating, and the resulting gains in speed and operational endurance.

Adım Adım Çözüm

1
Identify the core problem introduced in the opening sentences.
Wooden ships suffered severe physical damage and speed loss from burrowing worms and barnacles, and early remedies failed.
Establishing the initial conflict provides the context needed to understand why the author introduces subsequent actions.
2
Identify the key intervention and its direct operational results.
Applying copper sheathing poisoned marine growth, kept hulls smooth, increased sailing speeds, and minimized drydock repairs.
Tracking the resolution shows how the author connects the technical method to practical maritime advantages.
3
Synthesize the problem, method, and results into a single overarching takeaway.
The unstated central claim is that copper hull sheathing overcame long-standing fouling problems and significantly improved ship performance.
An implicit main idea must encompass all supporting elements rather than focusing exclusively on a single detail or making broad assumptions.

Anahtar Kavram

Synthesizing an unstated main idea by connecting the problem, the intervention, and the resulting outcomes
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Konular

Implicit Main Idea

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