earth science

Kaʻula

Kaʻula 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 Kaʻula rather than just read about it. In short: Kaʻula Island, also called Kaʻula Rock, is a small, crescent-shaped island in the Hawaiian Islands. It is located 22 miles southwest of Niʻihau.

Key takeaways

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

Reference excerpt

Kaʻula Island, also called Kaʻula Rock, is a small, crescent-shaped island in the Hawaiian Islands. It is located 22 miles southwest of Niʻihau.

Mythology In the legend of Papa and Wākea, Kaʻula is the seventh-born child.

Geography Kaʻula is located 23 mi (20 nmi; 37 km) west-southwest of Kawaihoa Point on Niʻihau, and about 150 nmi (173 mi; 278 km) west of Honolulu. The island is the top of a volcanic tuff cone that rests on top of a larger, submerged shield volcano. At its highest point, the island reaches a height of 548 ft (167 m). The ocean has carved large sea cliffs on the sides of the island. There is a large cave on the northwest side of the island called Kahalauaola (Shark Cave). The United States Census Bureau defines Kaʻula as Census Tract 411 of Kauaʻi County, Hawaiʻi. The 2000 census showed that the uninhabited island had a land area of 158.2 acres (0.640 km2; 0.2472 sq mi). Because of erosion, the island is slowly shrinking. Kaʻula, which he spelled as "Tahoora", was one of the first five islands sighted by Captain James Cook in 1778.

Lighthouse A lighthouse was completed on the island in 1932 by the United States Lighthouse Service, which became part of the United States Coast Guard in 1939. The lighthouse remained in operation through 1947.

Military use The island has been used as a bombing range by the United States Navy since at least 1952. Inert ordnance is currently used, although live explosive ordnance has been used in the past. There is a risk of unexploded ordnance on the island. Permission from the U.S. Navy is required to land on the island. In 1978, over the objection of the U.S. Navy, the state of Hawaiʻi claimed ownership of Kaʻula and named the island a State Seabird Sanctuary. A final determination of ownership has not yet been made, and the Navy still uses the southeast point of the island as an aerial bombing and strafing target.

Diving

Kaʻula is uninhabited, but fishermen and scuba divers frequently visit the island. Five Fathom Pinnacle, 3 mi (2.6 nmi; 4.8 km) west-northwest of Kaʻula, is also a noted dive spot.

Illustrations

Worked examples

Example 1 — a first encounter with Kaʻula

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

In research: Kaʻula 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 Kaʻula 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: Kaʻula is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cenozoic Hawaii, Geography of Kauai County, Hawaii, Hawaiian–Emperor seamount chain, so understanding it makes those chapters shorter.
In everyday life: Look for Kaʻula 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 Kaʻula in 20 minutes

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

Frequently asked questions

What is Kaʻula in simple terms?

Kaʻula Island, also called Kaʻula Rock, is a small, crescent-shaped island in the Hawaiian Islands. It is located 22 miles southwest of Niʻihau.

Why does Kaʻula 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 Kaʻula?

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 Kaʻula.