In the following question, select the odd word pair from the alternatives given below. Each pair links an object with its correct category/type. Identify the pair in which the classification is incorrect. (A) Venus : Planet (B) Moon : Satellite (C) Jupiter : Black Hole (D) Sun : Star (E) Earth : Planet

Difficulty: Easy

Correct Answer: Jupiter : Black Hole

Explanation:


Introduction / Context:
This odd-pair question tests basic astronomy classification. In each option, the left term is a celestial object and the right term is the category it belongs to. The correct odd pair is the one where the category is scientifically wrong, while the others are correct associations.


Given Data / Assumptions:

  • Planets: large bodies orbiting a star (like the Sun).
  • Satellites: bodies that orbit planets (natural moons).
  • Stars: self-luminous balls of hot gas producing energy via fusion.
  • Black holes: regions of spacetime with gravity so strong that light cannot escape; not planets.


Concept / Approach:
Check whether each left-side object truly belongs to the right-side category. If four are correct and one is incorrect, the incorrect one is the odd pair.


Step-by-Step Solution:

Venus is a planet in our solar system, so 'Venus : Planet' is correct. The Moon is Earth's natural satellite, so 'Moon : Satellite' is correct. The Sun is a star, so 'Sun : Star' is correct. Earth is also a planet, so 'Earth : Planet' is correct. Jupiter is a planet, not a black hole. So 'Jupiter : Black Hole' is incorrect.


Verification / Alternative check:
An easy verification is to recall the list of planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Jupiter is clearly in this list and therefore cannot be a black hole. Black holes are formed from extreme gravitational collapse, typically linked to massive stars, not normal planets.


Why Other Options Are Wrong:

Venus : Planet is correct, so it cannot be the odd one. Moon : Satellite is correct, so it cannot be the odd one. Sun : Star is correct, so it cannot be the odd one. Earth : Planet is correct, so it cannot be the odd one.


Common Pitfalls:
Some students confuse 'satellite' with 'planet' or think any large object in space could be a black hole. Another mistake is confusing Jupiter with a 'gas giant' category (which is still a planet). Always rely on correct scientific categories rather than dramatic terms like black hole.


Final Answer:
Jupiter : Black Hole

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