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Ketchup

Ketchup 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 Ketchup rather than just read about it. In short: Ketchup or catsup is a table condiment with a sweet and sour flavor. Ketchup now typically refers to tomato ketchup, although early recipes for different varieties contained mushrooms, oysters, mussels, egg whites, grapes, or walnuts, among other ingredients.

Ketchup — main illustration
Ketchup — illustration

Key takeaways

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

Reference excerpt

Ketchup or catsup is a table condiment with a sweet and sour flavor. Ketchup now typically refers to tomato ketchup, although early recipes for different varieties contained mushrooms, oysters, mussels, egg whites, grapes, or walnuts, among other ingredients. Tomato ketchup is made from tomatoes, sugar, and vinegar, with seasonings and spices. The spices and flavors vary but commonly include onions, allspice, coriander, cloves, cumin, garlic, mustard and sometimes include celery, cinnamon, or ginger. Tomato ketchup is sometimes used as a condiment for dishes that are usually served hot, and are fried or greasy. Tomato ketchup is sometimes used in other sauces and dressings, such as Thousand Island dressing and Marie Rose sauce, or as a general cooking ingredient. Its flavor may be replicated as an additive flavoring for snacks, such as potato chips.

Nomenclature

Terminology The term used for the sauce varies. Ketchup is the dominant term in North America and the UK, though catsup is commonly used in some southern US states and Mexico. The term "tomato sauce" is also used in the UK for something similar.

Etymology

The etymology of the word ketchup is unclear; there are multiple competing theories:

Amoy theory A folk etymology is that the word came from the Amoy (Xiamen) region of China into English, as a borrowed word 茄汁 (ke2 zap1, Cantonese, meaning "tomato sauce"; the character 茄 means 'eggplant'; tomato in Chinese is 番茄, so the phrase translates to foreign eggplant sauce). Another theory is that the word derives from one of two words from Hokkien of the Fujian region of coastal southern China: kôe-chiap (in the Amoy / Xiamen dialect and Quanzhou dialect) or kê-chiap (in the Zhangzhou dialect). Both pronunciations of the same word (膎汁, kôe-chiap / kê-chiap) come from the Quanzhou dialect, Amoy dialect, and Zhangzhou dialect of Hokkien, respectively, where it meant the brine of pickled fish or shellfish (膎, 'pickled food' (usually seafood) + 汁, 'juice'). There are citations of koe-chiap in the Chinese-English Dictionary of the Vernacular or Spoken Language of Amoy (1873) by Carstairs Douglas, defined as "brine of pickled fish or shell-fish".

Malay theory Ketchup may have entered the English language from the Malay word kicap (pronounced [kitʃap], sometimes spelled kecap or ketjap). Originally meaning "soy sauce", the word itself derives from Chinese. In Indonesian cuisine, which is similar to Malay, the term kecap refers to fermented savory sauces. Two main types are well known in their cuisine: kecap asin, which translates to "salty kecap" in Indonesian (a salty soy sauce) and kecap manis or "sweet kecap" in Indonesian. Kecap manis is a sweet soy sauce that is a mixture of soy sauce with brown sugar, molasses, garlic, ginger, anise, coriander and a bay leaf reduced over medium heat until rather syrupy. A third type, kecap ikan, meaning "fish kecap" is fish sauce similar to the Thai nam pla or the Philippine patis. It is not, however, soy-based.

European-Arabic theory American anthropologist E. N. Anderson relies on Elizabeth David to claim that ketchup is a cognate of the French escavèche, meaning "food in sauce". The word also exists in Spanish and Portuguese forms as escabeche, "a sauce for pickling", which culinary historian Karen Hess traced back to Arabic kabees, or "pickling with vinegar". The term was anglicized to caveach, a word first attested in the late 17th century, at the same time as ketchup.

History The term ketchup first appeared in 1682. The word entered the English language in Britain during the late 17th century, appearing in print as ketchup (1682), catchup (1690), and later as catsup (1730). Recipes for many types of ketchup began to appear in British and then American cookbooks in the 18th century.

Mushroom ketchup

In the United Kingdom, from the 1600s ketchup was prepared with mushrooms as a primary ingredient, rather than tomatoes. In the United States, mushroom ketchup dates back to at least 1770, and was prepared by British colonists in the Thirteen Colonies.

Tomato ketchup

… excerpt ends here. Continue reading the full article.

Illustrations

Ketchup illustration
Ketchup: Blue Label Tomato Ketchup advertisement, Curtice Brothers, 1898
Blue Label Tomato Ketchup advertisement, Curtice Brothers, 1898
Ketchup: Homemade mushroom ketchup in a plastic tub
Homemade mushroom ketchup in a plastic tub
Ketchup: Tomato ketchup and other condiments
Tomato ketchup and other condiments
Ketchup: Tomato ketchup next to raw tomatoes
Tomato ketchup next to raw tomatoes

Worked examples

Example 1 — a first encounter with Ketchup

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

In research
Ketchup 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 Ketchup 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
Ketchup is common in secondary-school and first-year university syllabi. It links to neighbouring topics Australian condiments, Condiments, Ketchup, so understanding it makes those chapters shorter.
In everyday life
Look for Ketchup 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 Ketchup in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Ketchup means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Ketchup out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ketchup in simple terms?

Ketchup or catsup is a table condiment with a sweet and sour flavor. Ketchup now typically refers to tomato ketchup, although early recipes for different varieties contained mushrooms, oysters, mussels, egg whites, grapes, or walnuts, among other ingredients.

Why does Ketchup 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 Ketchup?

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 Ketchup.

Tags

  • Australian condiments
  • Condiments
  • Ketchup
  • Non-Newtonian fluids
  • Sauces

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