science

Ōya stone

Ōya stone is a 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 Ōya stone rather than just read about it. In short: Ōya stone (大谷石, Ōya-ishi) is an igneous rock, created from lava and ash. Ōya stone was famously used in the facing of Frank Lloyd Wright's Imperial Hotel in Tokyo. One reason this stone was used is because it has a warm texture and is easily carved, which allows much versatility. Ōya stone can have different colors and is also fireproof. Ōya stone can only be found in an area 4 kilometers to the east and west by 6 k…

Key takeaways

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

Reference excerpt

Ōya stone (大谷石, Ōya-ishi) is an igneous rock, created from lava and ash. Ōya stone was famously used in the facing of Frank Lloyd Wright's Imperial Hotel in Tokyo. One reason this stone was used is because it has a warm texture and is easily carved, which allows much versatility. Ōya stone can have different colors and is also fireproof. Ōya stone can only be found in an area 4 kilometers to the east and west by 6 kilometers to the north and south around the town of Ōya, near Utsunomiya, but there are reserves of around 600 million tons.

Sources

External links http://www.asahi.com/english/TKY201006170491.html

Illustrations

Worked examples

Example 1 — a first encounter with Ōya stone

Start with the simplest possible case. Write down what Ōya stone claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In 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 Ōya stone 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 Ōya stone 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 Ōya stone

In research: Ōya stone appears in 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 Ōya stone 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: Ōya stone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Building stone, Igneous petrology stubs, Igneous rocks, so understanding it makes those chapters shorter.
In everyday life: Look for Ōya stone 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 Ōya stone in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ōya stone 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 Ōya stone out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ōya stone in simple terms?

Why does Ōya stone matter?

Because it connects several 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 Ōya stone?

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 Ōya stone.