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Nickel (United States coin)

Nickel (United States coin) is a biology 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 Nickel (United States coin) rather than just read about it. In short: A nickel is a five-cent coin minted by the United States Mint worth 1⁄20 of a dollar ($0.05). Currently composed of cupronickel (75% copper and 25% nickel), the piece has been issued since 1866.

Nickel (United States coin) — main illustration
Nickel (United States coin) — illustration

Key takeaways

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

Reference excerpt

A nickel is a five-cent coin minted by the United States Mint worth 1⁄20 of a dollar ($0.05). Currently composed of cupronickel (75% copper and 25% nickel), the piece has been issued since 1866. Its diameter is 0.835 inches (21.21 mm) and its thickness is 0.077 inches (1.95 mm). It is the second-lowest face-value physical unit of U.S. currency, after the penny. The silver half dime, equal to five cents, was issued from 1792 to 1873 before today's cupronickel version. The American Civil War caused economic hardship, driving gold and silver from circulation; in response, in place of low-value coins, the government at first issued paper currency. In 1865, Congress abolished the five-cent fractional currency note after Spencer M. Clark, head of the Currency Bureau (today the Bureau of Engraving and Printing), placed his own portrait on the denomination. After the successful introduction of two-cent and three-cent pieces without precious metal, Congress also authorized a five-cent piece consisting of base metal; the Mint began striking this version in 1866. The initial design of the Shield nickel was struck from 1866 until 1883, then was replaced by the Liberty Head nickel. The Buffalo nickel was introduced in 1913 as part of a drive to increase the beauty of American coinage. The nickel is minted in its modern form as the modification of the Jefferson nickel, which was first introduced in 1938. In 2004 and 2005, special Jefferson nickel designs in honor of the bicentennial of the Lewis and Clark Expedition were issued. In 2006, the Mint reverted to using Jefferson nickel designer Felix Schlag's original reverse (or "tails" side), although a new obverse, by Jamie Franki, was substituted. As of 2024, nickels cost $0.1378 per coin to produce and distribute. The 2024 production of nickels was 112,800,000, resulting in an annual cost to taxpayers of $17.7 million. The current purchasing power of a nickel is also well below that which the last remaining lowest-denomination coin (the penny) held at the time of the half-cent's elimination in 1857. This has led to proposals to eliminate the nickel along with the penny.

Silver half dime

The silver half disme (as the half dime, pronounced the same, was first called) was one of the denominations prescribed by the Mint Act of 1792; its weight and fineness were set by law. The first pieces under federal authority were half dimes, struck in 1792 in the cellar of John Harper, a saw maker; as the first federal mint was still under construction in Philadelphia, this took place locally at Sixth and Cherry Streets. The dies were engraved by Adam Eckfeldt, who a half-century later recalled that the silver for the half dimes was supplied by President George Washington, and that the 1,500 coins struck from the bullion were given to Washington's Secretary of State, Thomas Jefferson, for distribution to important people, both in the US and overseas. By legend, President Washington supplied silverware from his home, Mount Vernon, to provide bullion for the coins. In his annual message to Congress in late 1792, Washington noted the ongoing construction of a mint building and stated: "There has also been a small beginning in the coinage of half dimes, the want of small coins in circulation calling the first attention to them." In 1793, the newly established Philadelphia Mint began striking cents and half cents. Coinage of precious metal was delayed; Congress required the assayer and chief coiner to each post a security bond of $10,000, a huge sum in 1793. In 1794, Congress lowered the chief coiner's bond to $5,000, and the assayer's to $1,000; President Washington's appointees to those positions were thus able to qualify and take office. Subsequently, silver coinage began that year.

The half dime was originally struck from 1794 until 1805, though none were dated 1798, 1799, or 1804. By 1804, silver US coins were heavily exported, as they could be exchanged at par in the West Indies with heavier Spanish coins, which were then imported as bullion and deposited at the Mint for melting and restriking. In response, in 1804 the US stopped striking silver dollars; issuance of the half dime was discontinued from 1805 until 1829. In 1807, mint Director Robert Patterson in a letter explained to Jefferson (by then president) "nearly the whole of our Silver Bullion (chiefly Spanish dollars) come through the Banks, and it is very seldom that they will consent to take any coin less than half dollars."

Beginning in 1829, the silver five-cent piece was again struck; beginning in 1837, its fineness was increased from .8924 to .900. Also in 1837, the half dime's obverse design changed from one by William Kneass, depicting a bust of Liberty, to one that featured a seated Liberty by Christian Gobrecht; until its abolition in 1873, the half dime would bear modifications of this design. In 1851, it ceased to be the smallest US silver coin as a three cent piece was issued by the Mint.

Birth of the nickel

… excerpt ends here. Continue reading the full article.

Illustrations

Nickel (United States coin) illustration
Nickel (United States coin) illustration
Nickel (United States coin): A 1796 half dime
A 1796 half dime
Nickel (United States coin): 1829 silver five-cent piece
1829 silver five-cent piece
Nickel (United States coin): Spencer M. Clark, Supervisor of the Currency Bureau, placed his own likeness on the five-cent U.S. fractional currency note, leading directly to legislation prohibiting the depiction of any living person on U.S. currency.
Spencer M. Clark, Supervisor of the Currency Bureau, placed his own likeness on the five-cent U.S. fractional currency note, leading directly to legislation prohibiting the depiction of any living person on U.S. currency.

Worked examples

Example 1 — a first encounter with Nickel (United States coin)

Start with the simplest possible case. Write down what Nickel (United States coin) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Nickel (United States coin) 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 Nickel (United States coin) 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 Nickel (United States coin)

In research
Nickel (United States coin) appears in biology 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 Nickel (United States coin) 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
Nickel (United States coin) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1866 introductions, Cultural depictions of Thomas Jefferson, Five-cent coins of the United States, so understanding it makes those chapters shorter.
In everyday life
Look for Nickel (United States coin) 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 Nickel (United States coin) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Nickel (United States coin) 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 Nickel (United States coin) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Nickel (United States coin) in simple terms?

A nickel is a five-cent coin minted by the United States Mint worth 1⁄20 of a dollar ($0.05). Currently composed of cupronickel (75% copper and 25% nickel), the piece has been issued since 1866.

Why does Nickel (United States coin) matter?

Because it connects several biology 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 Nickel (United States coin)?

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 Nickel (United States coin).

Tags

  • 1866 introductions
  • Cultural depictions of Thomas Jefferson
  • Five-cent coins of the United States
  • Monticello
  • Nickel

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