science

Loch

Loch 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 Loch rather than just read about it. In short: Loch ( LOKH) is a word meaning "lake" or "sea inlet" in Scottish and Irish Gaelic, subsequently borrowed into English. In Irish contexts, it often appears in the anglicized form "lough".

Key takeaways

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

Reference excerpt

Loch ( LOKH) is a word meaning "lake" or "sea inlet" in Scottish and Irish Gaelic, subsequently borrowed into English. In Irish contexts, it often appears in the anglicized form "lough". A small loch is sometimes called a lochan. Lochs which connect to the sea may be called "sea lochs" or "sea loughs".

Background

Loch, as a name for a body of water, is Insular Celtic in origin and is applied to most lakes and many sea inlets in Scotland. Many of the loughs in Northern England have also previously been called "meres" (a Northern English dialect word for "lake", and an archaic Standard English word meaning "a lake that is broad in relation to its depth"), similar to the Dutch meer, such as the Black Lough in Northumberland. Some lochs in Southern Scotland have a Brythonic, rather than Goidelic, etymology, such as Loch Ryan, where the Gaelic loch has replaced a Cumbric equivalent of Welsh llwch. The same is, perhaps, the case for bodies of water in Northern England named with 'Low' or 'Lough', or else represents a borrowing of the Brythonic word into the Northumbrian dialect of Old English.

Scottish lakes Scotland has very few bodies of water called lakes. The Lake of Menteith, an Anglicisation of the Scots Laich o Menteith meaning a "low-lying bit of land in Menteith", is applied to the loch there because of the similarity of the sounds of the words laich and lake. Until the 19th century the body of water was known as the Loch of Menteith. The Lake of the Hirsel, Pressmennan Lake, Lake Louise and Raith Lake are man-made bodies of water in Scotland, referred to as lakes.

Lochs outside Scotland and Ireland As "loch" is a common Gaelic word, it is found as the root of several Manx place names. The United States naval port of Pearl Harbor, on the south coast of the main Hawaiian island of Oʻahu, is part of a complex of sea inlets. It contains three subareas called 'lochs' named East, Middle, and West or Kaihuopala‘ai, Wai‘awa, and Komoawa. Loch Raven Reservoir is a reservoir in Baltimore County, Maryland. Brenton Loch in the Falkland Islands is a sea loch, near Lafonia, East Falkland. In the Scottish settlement of Glengarry County in present-day Eastern Ontario, there is a lake called Loch Garry. Loch Garry was named by those who settled in the area, Clan MacDonell of Glengarry, after the well-known loch their clan is from, Loch Garry in Scotland. Similarly, lakes named Loch Broom, Big Loch, Greendale Loch, and Loch Lomond can be found in Nova Scotia, along with Loch Leven in Newfoundland, and Loch Leven in Saskatchewan. Loch Fyne is a fjord in Greenland named by Douglas Clavering in 1823.

Illustrations

Worked examples

Example 1 — a first encounter with Loch

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

In research: Loch 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 Loch 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: Loch is common in secondary-school and first-year university syllabi. It links to neighbouring topics Highlands and Islands of Scotland, Hydronymy, Lakes, so understanding it makes those chapters shorter.
In everyday life: Look for Loch 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 Loch in 20 minutes

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

Frequently asked questions

What is Loch in simple terms?

Loch ( LOKH) is a word meaning "lake" or "sea inlet" in Scottish and Irish Gaelic, subsequently borrowed into English. In Irish contexts, it often appears in the anglicized form "lough".

Why does Loch 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 Loch?

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 Loch.