earth science

Roca Partida

Roca Partida 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 Roca Partida rather than just read about it. In short: Roca Partida (English: Split Rock) ranks as the smallest of the four Revillagigedo Islands, part of the Free and Sovereign State of Colima in Mexico. The uninhabited island (Latitude 19° 0'2.53"N, Longitude 112° 4'5.35"W) encompasses an extremely small area.

Key takeaways

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

Reference excerpt

Roca Partida (English: Split Rock) ranks as the smallest of the four Revillagigedo Islands, part of the Free and Sovereign State of Colima in Mexico. The uninhabited island (Latitude 19° 0'2.53"N, Longitude 112° 4'5.35"W) encompasses an extremely small area. Many divers rank it among the most beautiful dive sites in Mexico. Divers must obtain permits from the Mexican Armed Forces to enter the military zone surrounding the island.

Geography

The four Revillagigedo Islands originated as volcanoes. San Benedicto Island and Socorro Island erupted in 1953 and 1993, respectively. Clarion Island and Roca Partida lack recently known eruptions. Erosion over millennia reduced Roca Partida to a piece of bare rock, devoid of terrestrial vegetation. Roca Partida, 100 metres (330 ft) long and 8 metres (26 ft) wide, rises into two peaks. A low-lying bare rock area divides the two peaks, hence the name "Split Rock." The two peaks measured 25 metres (82 ft) and 34 metres (112 ft) high in 1953, but the higher peak has apparently lost several meters (feet) since then, as the photographs illustrate.

Fauna Roca Partida lacks fresh water and supports no land animals. Nevertheless, the waters surrounding the islet teem with marine life. Several species of seabird breed on the rock, including the Nazca booby (Sula granti), which probably ventures little farther to the northeast; the Northeast Pacific brown booby (Sula leucogaster brewsteri); the East Pacific sooty tern (Onychoprion fuscatus crissalis), a doubtfully distinct subspecies; and the East Pacific brown noddy (Anous stolidus ridgwayi).

History The island's first reported sighting was in November 1542 by the Spanish expedition of Ruy López de Villalobos, who charted it with its present-day name.

References

External links

Marine Life of Roca Partida Scuba Diving in Roca Partida Archived 2009-08-03 at the Wayback Machine Information page with map

Illustrations

Worked examples

Example 1 — a first encounter with Roca Partida

Start with the simplest possible case. Write down what Roca Partida 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 Roca Partida 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 Roca Partida 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 Roca Partida

In research: Roca Partida 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 Roca Partida 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: Roca Partida is common in secondary-school and first-year university syllabi. It links to neighbouring topics Revillagigedo Islands, Stacks (geology), Uninhabited islands of Mexico, so understanding it makes those chapters shorter.
In everyday life: Look for Roca Partida 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 Roca Partida in 20 minutes

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

Frequently asked questions

What is Roca Partida in simple terms?

Why does Roca Partida 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 Roca Partida?

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 Roca Partida.