Understanding Word Analogies

Word analogies test your ability to identify the relationship between a pair of words and apply that same relationship to another word to find the missing term. In this analogy, we have two pairs: Darwin : Evolution and Archimedes : ?

Analyzing the First Pair: Darwin and Evolution

The first pair is Darwin : Evolution.

• Charles Darwin was a famous naturalist.
• He is best known for his theory of Evolution by natural selection.

The relationship here is "Scientist : Major Theory/Concept discovered or popularized by the scientist".

Exploring Archimedes' Contributions

We need to find a concept or discovery associated with Archimedes that fits the same "Scientist : Major Theory/Concept" relationship. Archimedes was a prominent ancient Greek mathematician, physicist, engineer, inventor, and astronomer.

Evaluating the Options

Let's look at the given options:

1. Friction
2. Lubrication
3. Buoyancy
4. Liquids

Why Buoyancy is the Correct Answer

Considering the relationship identified in the first pair (Scientist : Major Theory/Concept), let's examine how each option relates to Archimedes.

• Friction and Lubrication are concepts in physics, but they are not primarily or uniquely associated with Archimedes.
• Liquids are involved in many areas of physics, including concepts Archimedes studied, but "Liquids" itself is not a specific theory or principle attributed to him.
• Buoyancy, however, is strongly associated with Archimedes through the discovery of Archimedes' Principle. This principle explains the upward buoyant force exerted on a body immersed in a fluid, equal to the weight of the fluid the body displaces. This is one of Archimedes' most famous contributions to physics.

Thus, the relationship "Scientist : Major Theory/Concept" holds true for Archimedes : Buoyancy.

Incorrect Options Analysis

Let's briefly consider why the other options don't fit as well:

• Friction: While a fundamental concept in physics, its main principles are not attributed to Archimedes.
• Lubrication: This is related to reducing friction and is not a primary discovery of Archimedes.
• Liquids: Archimedes studied the mechanics of fluids, but the term 'Liquids' is too general to be his specific major contribution in the same way Evolution is Darwin's or Buoyancy is Archimedes'.

Summarizing the Analogy

The analogy follows the pattern: [Scientist] : [Major Scientific Contribution/Theory].

• Darwin is famous for his theory of Evolution.
• Archimedes is famous for his principle concerning Buoyancy.

Therefore, the analogy is Darwin : Evolution : : Archimedes : Buoyancy.

Revision Table: Key Scientists & Concepts

Here is a table listing some other famous scientists and their key associated concepts:

Additional Information: Principles of Buoyancy

Archimedes' Principle is a fundamental law of physics that states:

"Any body completely or partially immersed in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force, the magnitude of which is equal to the weight of the fluid displaced by the body."

This principle is crucial for understanding why objects float or sink. If the buoyant force is greater than the object's weight, it floats. If it's less, it sinks. If they are equal, it remains suspended.

This principle is a cornerstone of hydrostatics, the study of fluids at rest, a field where Archimedes made significant contributions.