Question

At a speed 1,07,200 km per hour, the earth travels around the sun to complete one _________.
A. Evolution
B. Revolution
C. Evaluation
D. None of these

Answer 1

Hint: The Sun is known to be a star that is positioned at the center of the Solar System. It is almost a complete sphere of hot plasma, heated to incandescence by nuclear fusion. Its core generally reflects light and infrared radiation. It is the source of energy on earth. Its diameter is said to be about $1.39$ million kilometers’ that is 864000 miles.

Complete answer:
In the entire solar system, Earth is the only planet where life is possible, the speed of Earth's rotation in the equator is about 40,000 km and earth nearly takes 1 day that is 24 hrs. To complete one rotation and, the speed is calculated by,
${\text{Speed}} = \dfrac{{{\text{distance}}}}{{{\text{time}}}} = \dfrac{{40000}}{{24}}$
So, the speed of rotation is 1670 km per hour.
And similarly to find the speed of revolution of the earth around the sun then, also the same formula is applied.
${\text{speed of revolution}} = \dfrac{{942000000}}{{8766}}$
So the speed of revolution is 107,000 km per hour from which the earth revolves around the sun.

Thus, option (B) is correct.

Note: Earth is situated in the third position in the entire solar system, it is the only planet where life and atmosphere are possible. It rotates on its axis, the rotation of the earth is responsible for day and night and similarly, the earth revolves around the sun with a speed of 107,000 km per hour and that revolution is responsible for seasonal changes. The summer season generally arises when the earth is near to the axis of the sun.