earth science

Iwo Jima rail

Iwo Jima rail is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Iwo Jima rail rather than just read about it. In short: The Iwo Jima rail or white-browed crake (Poliolimnas cinereus brevipes) is an extinct subspecies of the white-browed crake native to the island of Iwo Jima. The last reported sightings were in 1924, and the subspecies is believed to be extinct.

Key takeaways

Iwo Jima rail belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Iwo Jima rail to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Iwo Jima rail from memory before moving on to harder problems.

Reference excerpt

The Iwo Jima rail or white-browed crake (Poliolimnas cinereus brevipes) is an extinct subspecies of the white-browed crake native to the island of Iwo Jima. The last reported sightings were in 1924, and the subspecies is believed to be extinct.

Description The Iwo Jima rail was coloured dark brown, with black mottles on its back, and a white colouration on its belly. The bird was typically about six inches long.

Ecology The species Poliolimnas cinereus is typically found in both brackish water and fresh water marshes. Iwo Jima, however, lacked these features, and the Iwo Jima subspecies lived in the brush and tall grass along rivulets on the island, as well as damp places within the original forest cover.

Extinction When humans settled the island of Iwo Jima, they cleared away the existing forest to grow sugarcane. The forest clearance reduced the availability of fresh water, which forced the bird to come into the settlements to find water during the dry season. Here the birds often fell pray to cats. Combined with the introduction of rats to the island, this caused the extinction of the bird. The last specimen of the bird was collected in 1911, and the last reported sightings were by T. T. Moniyama in 1924.

References

Worked examples

Example 1 — a first encounter with Iwo Jima rail

Start with the simplest possible case. Write down what Iwo Jima rail claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Iwo Jima rail before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Iwo Jima rail ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Iwo Jima rail

In research: Iwo Jima rail appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Iwo Jima rail in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Iwo Jima rail is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amaurornis, Controversial bird taxa, Extinct animals of Japan, so understanding it makes those chapters shorter.
In everyday life: Look for Iwo Jima rail outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Iwo Jima rail in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Iwo Jima rail means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Iwo Jima rail out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Iwo Jima rail in simple terms?

Why does Iwo Jima rail matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Iwo Jima rail?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Iwo Jima rail.