science

Wislicenus (crater)

Wislicenus (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 Wislicenus (crater) rather than just read about it. In short: Wislicenus is an impact crater on Mars, located in the Sinus Sabaeus quadrangle at 18.4° south latitude and 348.6° west longitude. It measures approximately 140.15 km (87.09 mi) in diameter and was named after German astronomer Walter Wislicenus (1859–1905).

Key takeaways

Wislicenus (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 Wislicenus (crater) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Wislicenus (crater) from memory before moving on to harder problems.

Reference excerpt

Wislicenus is an impact crater on Mars, located in the Sinus Sabaeus quadrangle at 18.4° south latitude and 348.6° west longitude. It measures approximately 140.15 km (87.09 mi) in diameter and was named after German astronomer Walter Wislicenus (1859–1905). The name was adopted by the IAU in 1973.

Layers

Wislicenus crater contains layers, also called strata. Many places on Mars show rocks arranged in layers. Sometimes the layers are of different colors. Light-toned rocks on Mars have been associated with hydrated minerals like sulfates. The Mars rover Opportunity examined such layers close-up with several instruments. Some layers are probably made up of fine particles because they seem to break up into find dust. Other layers break up into large boulders so they are probably much harder. Basalt, a volcanic rock, is thought to in the layers that form boulders. Basalt has been identified on Mars in many places. Instruments on orbiting spacecraft have detected clay (also called phyllosilicates) in some layers. Scientists are excited about finding hydrated minerals such as sulfates and clays on Mars because they are usually formed in the presence of water. Areas that contain clays and/or other hydrated minerals would be good places to look for evidence of life. Rock can form layers in a variety of ways. Volcanoes, wind, or water can produce layers. However, the presence of hydrated minerals in Wislicenus crater is strong evidence for the involvement of water, perhaps in a lake. Many craters once contained lakes.

Illustrations

Wislicenus (crater): Western side of Wislicenus as seen by CTX camera on MRO — Western side of Wislicenus as seen by CTX camera on MRO

Worked examples

Example 1 — a first encounter with Wislicenus (crater)

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

In research: Wislicenus (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 Wislicenus (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: Wislicenus (crater) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Impact craters on Mars, Sinus Sabaeus quadrangle, so understanding it makes those chapters shorter.
In everyday life: Look for Wislicenus (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.

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How to study Wislicenus (crater) in 20 minutes

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

Frequently asked questions

What is Wislicenus (crater) in simple terms?

Why does Wislicenus (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 Wislicenus (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 Wislicenus (crater).