Question

Which of the following is the smallest planet?
A. Jupiter
B. Venus
C. Mercury
D. None of the above

Answer 1

Hint: This is a theoretical question. In order to answer this question, the total number of planets and their respective sizes should be known. We can solve this question, either by comparing the mass and volume of each planet or the radius of each planet. The planet with the smallest radius will be considered as the smallest planet.

Complete answer:
We know that there are a total of 8 planets as of now. So, we need to know the size of each planet to compare the planet’s size. There are many ways to know the size of the planets. By finding the mass and volume of each planet, we can get to know the size of each planet. The other method is to find the radius of each planet.
The radius of the planets is listed as follows.
In the case of the planet, mercury, the radius of the planet is 2,439.7 km. In the case of the planet, earth, the radius of the planet is 6,371 km. In the case of the planet, Saturn, the radius of the planet is 58,232 km. In the case of the planet, Mars, the radius of the planet is 3,389.5 km. In the case of the planet, Neptune, the radius of the planet is 24,622 km. In the case of the planet, Jupiter, the radius of the planet is 69,911 km. In the case of the planet, Venus, the radius of the planet is 6,051.8 km. In the case of the planet, Uranus, the radius of the planet is 25,362 km.
Therefore, the planet with the smallest radius will be the smallest planet. From the above data, it’s clear that the radius of the planet Mercury is the smallest, thus, the planet Mercury is the smallest one.

So, the correct answer is “Option C”.

Note: There are a total of 8 planets. They are Mercury, Venus, Earth, Mars, Jupiter, Uranus, Neptune and Saturn. The question is to find the smallest planet, even, the biggest planet can be asked. In order to solve this question, the radius of each planet should be known.