ArticleslgStudy

science

McKellar (crater)

McKellar (crater) 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 McKellar (crater) rather than just read about it. In short: McKellar is a lunar impact crater on the Moon's far side, and it cannot be viewed directly from the Earth. It lies to the southwest of the crater Crookes, and the ray system from this impact covers the floor and sides of McKellar.

McKellar (crater) — main illustration
McKellar (crater) — illustration

Key takeaways

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

Reference excerpt

McKellar is a lunar impact crater on the Moon's far side, and it cannot be viewed directly from the Earth. It lies to the southwest of the crater Crookes, and the ray system from this impact covers the floor and sides of McKellar. To the south is the slightly smaller Bok. This crater is somewhat eroded, with a small crater along the northwestern rim. The interior floor is relatively level except for a cluster of three ridges arrayed to the north and west of the midpoint. Just to the south of this crater is a patch of high albedo on the surface, which is usually interpreted as an indication of a relatively fresh impact. The crater was named by the IAU in 1970 after Canadian astronomer Andrew McKellar.

Satellite craters By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to McKellar.

References

Sources

Illustrations

McKellar (crater) illustration

Worked examples

Example 1 — a first encounter with McKellar (crater)

Start with the simplest possible case. Write down what McKellar (crater) 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 McKellar (crater) 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 McKellar (crater) 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 McKellar (crater)

In research
McKellar (crater) 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 McKellar (crater) 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
McKellar (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on the Moon, LQ16 quadrangle, so understanding it makes those chapters shorter.
In everyday life
Look for McKellar (crater) 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.
Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “McKellar (crater)” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study McKellar (crater) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what McKellar (crater) means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain McKellar (crater) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is McKellar (crater) in simple terms?

McKellar is a lunar impact crater on the Moon's far side, and it cannot be viewed directly from the Earth. It lies to the southwest of the crater Crookes, and the ray system from this impact covers the floor and sides of McKellar.

Why does McKellar (crater) 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 McKellar (crater)?

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 McKellar (crater).

Tags

  • Impact craters on the Moon
  • LQ16 quadrangle

Keep exploring