Rotation

The spinning of the Earth on its axis is called rotation. It is one of the basic movements of the Earth and is responsible for day and night.

What is rotation?
Rotation refers to the spinning of an object around its own axis. In the case of the Earth, it rotates from west to east. This rotation takes approximately 24 hours to complete one full rotation.

Earth's Axis
The Earth's axis is an imaginary line that runs through the North and South Poles. It is tilted at an angle of about 23.5 degrees with respect to its orbit around the Sun. This tilt is what causes the changing seasons on Earth.

Effects of Rotation
The rotation of the Earth has several important effects:

1. Day and Night: As the Earth rotates, different parts of the planet are exposed to the Sun's light. The side facing the Sun experiences daylight, while the opposite side experiences darkness. This rotation creates the cycle of day and night.

2. Equal Day and Night: During the equinoxes, which occur around March 21st and September 21st, the Earth's axis is not tilted towards or away from the Sun. This results in equal lengths of day and night all over the world.

3. Coriolis Effect: The rotation of the Earth also causes the Coriolis effect, which is responsible for the way winds and ocean currents curve. This effect is due to the rotation of the Earth underneath moving objects.

4. Apparent Movement of Celestial Bodies: The rotation of the Earth gives the appearance of movement of celestial bodies such as the Sun, Moon, and stars across the sky. This apparent movement is caused by the rotation of the Earth rather than the actual movement of these objects.

Conclusion
In conclusion, the spinning of the Earth on its axis is called rotation. It is this rotation that gives us day and night, as well as causes the apparent movement of celestial bodies. Understanding the concept of rotation is fundamental to understanding various aspects of Earth's dynamics.

The force exerted by the earth to pull the object towards itself is called Gravitational force.