science

Junk drawer

Junk drawer 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 Junk drawer rather than just read about it. In short: A junk drawer or junkdrawer is a drawer used for storing small, miscellaneous, occasionally useful objects of little to no (or unclear) monetary value, and possibly significant sentimental value. Junk drawers are often located in residential kitchens, but they may exist anywhere with cabinetry or furniture used for storage, including home offices or workshops, and even commercial workplaces and businesses.

Key takeaways

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

Reference excerpt

A junk drawer or junkdrawer is a drawer used for storing small, miscellaneous, occasionally useful objects of little to no (or unclear) monetary value, and possibly significant sentimental value. Junk drawers are often located in residential kitchens, but they may exist anywhere with cabinetry or furniture used for storage, including home offices or workshops, and even commercial workplaces and businesses. The phrase "junk drawer" appears to be an Americanism dating to the early 1900s.

Typical contents Junk drawers often contain various types of unrelated and unorganized objects, such as small commonly used tools like screwdrivers, pliers, tape measures, scissors, glue, sandpaper, birthday candles, and pens; small, loose, hard-to-store items like thumbtacks, binder clips, toothpicks, rubber bands, batteries, and safety pins; stationery and crafting materials; "leftover" objects of uncertain or forgotten origin like "orphaned" board game pieces, bottle caps, and old electronics chargers; coins and receipts; medication and bandages; or even objects with sentimental value such as souvenirs and love letters.

Etymology and history The Oxford English Dictionary dates the first use of the phrase to a 1912 article in The Journal of the Allied Societies, which recommends the use of "a 5⁄8-inch sandpaper disk cutter, if you happen to have one in the junk drawer".

In popular culture American novelist John R. Powers published a book titled The Junk Drawer, Corner Store, Front Porch Blues in 1992.

References

Illustrations

Worked examples

Example 1 — a first encounter with Junk drawer

Start with the simplest possible case. Write down what Junk drawer 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 Junk drawer 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 Junk drawer 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 Junk drawer

In research: Junk drawer 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 Junk drawer 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: Junk drawer is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cabinets (furniture), Containers, Furniture, so understanding it makes those chapters shorter.
In everyday life: Look for Junk drawer 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 Junk drawer in 20 minutes

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

Frequently asked questions

What is Junk drawer in simple terms?

Why does Junk drawer 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 Junk drawer?

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 Junk drawer.