earth science

Parent body

Parent body is a earth 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 Parent body rather than just read about it. In short: A parent body in meteoritics is the celestial body from which originates a meteorite or a class of meteorites. Identification It is easiest to correlate a meteorite with a parent body when the parent body still exists.

Key takeaways

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

Reference excerpt

A parent body in meteoritics is the celestial body from which originates a meteorite or a class of meteorites.

Identification It is easiest to correlate a meteorite with a parent body when the parent body still exists. This is the case for Lunar and Martian meteorites. Samples from suspected Lunar meteorites can be compared with samples from the Apollo program. Martian meteorites can be compared to analysis carried out by rovers (e.g. Curiosity). Meteorites can also be compared to spectral classes of asteroids. In order to identify the parent body of a class of meteorites, scientists compare their albedo and spectra with other known bodies. These studies show that some meteorite classes are closely related to some asteroids. The HED meteorites for example are correlated with 4 Vesta. Another, perhaps most useful way to classify meteorites by parent bodies is by grouping them according to composition, with types from each hypothetical parent body clustering on a graph. Meteoriticists have tentatively linked extant meteorites to 100-150 parent bodies, far fewer than the ~1 million main-belt asteroids larger than a kilometer. This apparent sampling bias remains an area of active research.

See also Asteroid family Glossary of meteoritics

References

Worked examples

Example 1 — a first encounter with Parent body

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

In research: Parent body appears in earth 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 Parent body 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: Parent body is common in secondary-school and first-year university syllabi. It links to neighbouring topics Asteroids, Meteorite mineralogy and petrology, Meteorites, so understanding it makes those chapters shorter.
In everyday life: Look for Parent body 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 Parent body in 20 minutes

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

Frequently asked questions

What is Parent body in simple terms?

A parent body in meteoritics is the celestial body from which originates a meteorite or a class of meteorites. Identification It is easiest to correlate a meteorite with a parent body when the parent body still exists.

Why does Parent body matter?

Because it connects several earth 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 Parent body?

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 Parent body.