Question

Which planet is considered as 'Earth's-twin' because of its size and shape are very much similar to that of the earth?

• A. Mercury
• B. Venus
• C. Mars
• D. Pluto

Hint:

While Venus is Earth's twin in size, its environment is vastly different: it has a runaway greenhouse effect, a crushing carbon dioxide atmosphere, and surface temperatures hot enough to melt lead, making it the hottest planet in the solar system.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
The question asks to identify the planet known as "Earth's twin". The reason given is the similarity in size and shape.

Step 2: Comparing the Planets


(A) Mercury: The smallest planet in the solar system, much smaller than Earth.

(B) Venus: Venus is the closest planet to Earth in terms of size and mass. Its diameter is about 95% of Earth's diameter, and its mass is about 81.5% of Earth's. Because of these similarities, it is often called Earth's twin or sister planet.

(C) Mars: Mars is significantly smaller than Earth, with a diameter about half that of Earth.

(D) Pluto: Pluto is a dwarf planet and is much smaller than Earth.


Step 3: Final Answer
Due to its similar size, mass, and composition, Venus is famously known as Earth's twin. Therefore, option (B) is the correct answer.