science

Old Sow whirlpool

Old Sow whirlpool 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 Old Sow whirlpool rather than just read about it. In short: Old Sow (Mocinikosk, in Maliseet-Passamaquoddy) is the largest tidal whirlpool in the Western Hemisphere, located off the southwestern shore of Deer Island, New Brunswick, Canada, and off the northeast shore of Moose Island, the principal island of Eastport, Maine. It is considered most visible and dangerous three hours after low tide.

Key takeaways

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

Reference excerpt

Old Sow (Mocinikosk, in Maliseet-Passamaquoddy) is the largest tidal whirlpool in the Western Hemisphere, located off the southwestern shore of Deer Island, New Brunswick, Canada, and off the northeast shore of Moose Island, the principal island of Eastport, Maine. It is considered most visible and dangerous three hours after low tide. The name has been in use since at least 1935.

Origin

The whirlpool is caused by local bathymetry and a 20-foot (6.1 m) tidal range where waters exchange between Passamaquoddy Bay and the Bay of Fundy, combined with the topography of the location's sea floor at the confluence of the numerous local currents through channels and over small sea mounts. The whirlpools form in an area with a diameter of approximately 250 feet (76 m), as determined by the president of the Old Sow Whirlpool Survivors' Association in 1997 by way of an aerial photograph. The photograph was calibrated using the Deer Island Point Light beacon tower of known width that was included in the photograph. Old Sow is one of five significant whirlpools worldwide (Corryvreckan, Scotland; Saltstraumen, Norway; Moskstraumen, Norway; and the Naruto whirlpools, Japan, are the others). Although the tidal currents within Western Passage surrounding Old Sow compare with faster whirlpools elsewhere, the speed of Old Sow's vortex is considerably slower than the Moskstraumen, the world's most powerful whirlpool.

Tremendous water turbulence occurs locally in the greater Old Sow area, but it does not usually constitute a navigation hazard for motorized vessels with experienced operators at the helm; however, small craft—especially vessels with keels (sailboats) and human-powered vessels—are warned to avoid these waters when the tide is running. Besides Old Sow and its numerous "piglets" (small and medium whirlpools surrounding Old Sow), other area phenomena include standing waves, upwellings (that on rare occasion may even spout several feet into the air), and 10–17 feet (3.0–5.2 m) deep or more, circular and trench-shaped depressions in the water. The failed Passamaquoddy Tidal Power Project/"Quoddy Dam" Project saw a series of tidal dikes constructed during the 1930s to connect Moose Island (Eastport, Maine) to Carlow Island (in Eastport), Carlow Island to Pleasant Point and to connect Treat Island (in Eastport) to Dudley Island (in Lubec, Maine). The changes in local water flow from the dikes reportedly reduced predictability of the "funnel" effect of Old Sow.

Accidents

On March 28, 1830, a two-mast schooner was destroyed in the whirlpool drowning brothers Robert, James and William Stover whose widowed mother lived in Fairhaven. Around 1912, Cecil Chaffee of Eastport drowned while rowing near the whirlpool. In 1943 Eastport resident James Roland Mitchell Sr. drowned when the boom of his sailboat knocked him into the waters.

References

External links Old Sow Whirlpool Old Sow Whirlpool Survivors Association Old Sow Whirlpool Bay of Fundy

Illustrations

Worked examples

Example 1 — a first encounter with Old Sow whirlpool

Start with the simplest possible case. Write down what Old Sow whirlpool 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 Old Sow whirlpool 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 Old Sow whirlpool 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 Old Sow whirlpool

In research: Old Sow whirlpool 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 Old Sow whirlpool 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: Old Sow whirlpool is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bodies of water of New Brunswick, Bodies of water of Washington County, Maine, Eastport, Maine, so understanding it makes those chapters shorter.
In everyday life: Look for Old Sow whirlpool 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 Old Sow whirlpool in 20 minutes

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

Frequently asked questions

What is Old Sow whirlpool in simple terms?

Why does Old Sow whirlpool 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 Old Sow whirlpool?

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 Old Sow whirlpool.