Question

The following planet is considered as earth's-twin
A. Mars
B. Venus
C. Mercury
D. Saturn

Answer 1

Hint: To answer this question, we must know that the planet of earth is considered by comparing its size, mass, proximity to the sun and bulk compensation to that of earth. That means they must have physical similarities between them. So we will compare the physical similarities of the given planets with earth and select the most matching planet.

Complete step by step answer:
Firstly we have the planet mars. If we compare the size of mars with earth, it is only one-half the diameter of earth. But both planets have roughly the same amount of dry land surface area. This is because one-third of the earth surface is covered with water.
Now, if we compare planet Venus with Earth, they are almost the same size, have about the same mass, and have a similar composition. Venus and earth are neighboring planets but they also have their own differences. Although Venus is called Earth's twin due to these similarities.
If we compare mercury with earth, it has a very smaller size than earth. So, we cannot relate their physical properties. Now, in the case of Saturn, it is 9.5 times bigger than earth. So, we can’t compare them too.
Therefore, we can conclude that Venus is considered as Earth’s twin planet for their similarities.

So, the correct answer is “Option B”.

Note:
Although Venus is considered as Earth’s twin, they are also very different. We must know that Venus has an atmosphere which is about 100 times thicker than earth’s and has very hot surface temperature. Venus also doesn’t have life or water on its surface and compared to other planets, it rotates backwards.