science

Zinka

Zinka 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 Zinka rather than just read about it. In short: Zinka is a brand of sunscreen once owned by Schering-Plough. Originating in Southern California and popular in the late 1980s, the zinc oxide product is manufactured in nine colors.

Key takeaways

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

Reference excerpt

Zinka is a brand of sunscreen once owned by Schering-Plough. Originating in Southern California and popular in the late 1980s, the zinc oxide product is manufactured in nine colors. Although Zinka is traditionally associated with "colored-noses", the product does come in a clear variety. Zinka Nosecoat provides protection from UVA/UVB rays and is resistant to all weather conditions. The products have received some endorsements by dermatologists, professional athletes and outdoor enthusiasts.

History Zinka products started in 1986 with the idea of adding color to lifeguards zinc covered noses. After a few months, the company grew from 2 people to 60 employees. Zinka suncare products are made from zinc oxide and come in a variety of 16 colors. The company sponsors professional surfers, volleyball players, and other athletes. Upon their success, Zinka began expanding their products from just nose cover to oils, clear sunscreens, and lip balms. The company is based in Rancho Dominguez, California. In the following years, the demand for bright colored Zinka products fell.

References

Further reading "Zinka: Colorful Sunscreen Makes a Comeback". Yahoo!. August 13, 2015. Retrieved June 26, 2016. "ZINC: Return of the on slope flair with ZINKA". The Ski Channel. February 4, 2010. Archived from the original on July 1, 2016. Retrieved June 26, 2016. Kikuchi, June (November 1987). "News For The Nose". Orange Coast Magazine. p. 133. Retrieved 25 June 2016. "Zinc Face Sunscreen". Esquire. June 28, 2012. Retrieved June 26, 2016.

External links Official website

Worked examples

Example 1 — a first encounter with Zinka

Start with the simplest possible case. Write down what Zinka 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 Zinka 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 Zinka 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 Zinka

In research: Zinka 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 Zinka 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: Zinka is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drugs developed by Schering-Plough, Personal care brands, so understanding it makes those chapters shorter.
In everyday life: Look for Zinka 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 Zinka in 20 minutes

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

Frequently asked questions

What is Zinka in simple terms?

Zinka is a brand of sunscreen once owned by Schering-Plough. Originating in Southern California and popular in the late 1980s, the zinc oxide product is manufactured in nine colors.

Why does Zinka 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 Zinka?

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 Zinka.