Understanding the Analogy Question

The question asks us to find the word that has the same relationship with 'Moon' as 'Planet' has with 'Earth'. This is a classic analogy question where we need to identify the relationship in the first pair of words and apply that relationship to the third word to find the fourth word.

The first pair is: Earth : Planet

Let's analyze the relationship between Earth and Planet.

• Earth is a specific example of a type of celestial body called a Planet.
• In other words, a Planet is a classification or category, and Earth belongs to that category.

So, the relationship is: Specific Example : Category or Member : Group.

Applying the Analogy to the Second Pair

Now we apply this same relationship to the second pair. The third word is 'Moon'. We need to find what 'Moon' is a specific example of, or what category 'Moon' belongs to, from the given options.

The second pair is: Moon : ?

We are looking for the category or classification for the Moon.

Evaluating the Options for Moon's Relationship

Let's look at the provided options:

1. Rocket: A rocket is a vehicle used for space travel. The Moon is not a type of rocket. This relationship does not fit the pattern.
2. Space: Space is the vast area where celestial bodies exist. The Moon exists in space, but space is not a category that defines what the Moon is. This relationship does not fit the pattern.
3. Satellite: A satellite is a celestial body that orbits a planet or star. The Moon is a natural celestial body that orbits the Earth. Therefore, the Moon is a natural satellite of the Earth. This fits the pattern: Moon (Specific Example) : Satellite (Category).
4. Orbit: An orbit is the path a celestial body takes around another object. Orbit is a concept related to the movement of the Moon, not a classification of what the Moon is. This relationship does not fit the pattern.

Conclusion: The Moon's Classification

Based on the analysis, the relationship between Earth and Planet (Specific Example : Category) is mirrored by the relationship between Moon and Satellite. The Earth is a Planet, and the Moon is a Satellite.

Therefore, the word that completes the analogy is Satellite.

Revision Table: Analogy Keywords

Additional Information: Celestial Body Classifications

Understanding the classification of celestial bodies is helpful for solving such analogies related to space.

• Planet: A large celestial body that orbits a star. Examples include Earth, Mars, Jupiter.
• Satellite: A celestial body that orbits a planet. Can be natural (like the Moon) or artificial (man-made).
• Star: A large, luminous sphere of plasma held together by gravity. The Sun is a star.
• Asteroid: A rocky object orbiting the Sun, typically smaller than a planet.
• Comet: An icy, rocky body that orbits the Sun, often with a visible tail.
• Galaxy: A vast system of stars, gas, dust, and dark matter held together by gravity. Our galaxy is the Milky Way.

In this analogy, the Moon is specifically known as a natural satellite because it orbits the Earth.