We explain to you what is the rotation of the Earth and what are its consequences. The speed it reaches and the translation of the Earth.
What is the rotation of the Earth?
The rotation of the Earth is the movement that makes the planet rotate on its own axis, that is to say, on its own. This same axis consists of an imaginary line that crosses the geographical poles and that has an inclination of 24 with respect to the Earth's orbit.
The earth rotation movement takes 24 hours to make the complete rotation, at a speed of 1, 700 kilometers per hour, if measured at the equator. the movement because it is done constantly and because we move at the same speed with the Earth, that is, we are part of the same system of terrestrial movement. If the speed of the movement were not constant, we would feel it due to inertia.
See also: Climate Change.
Consequences of the movement of rotation
The Earth's rotation movement generates consequences at the geographical, climatic, terrestrial and physical levels. The main ones are:
- The succession of day and night. The Sun illuminates only one half of the planet, which determines that it is day, while the opposite face remains dark generating night. As the planet rotates on its own axis, the face that remained dark begins to receive the light and the other half darkens.
- Time differences. The time zone system consists of a division of the day into hours for the entire planet, and has as its starting point or reference, the zero meridian or Greenwich meridian. That is why it dawns and dusk in the eastern hemisphere rather than in the western hemisphere.
- The variation of temperature. The succession of day and night means that, during the day, the illuminated face of the planet receives more solar radiation. That energy accumulates and generates a temperature rise. During the night, that face does not receive solar radiation and the temperature decreases.
- The shape of the Earth. If the Earth were still, its sphere shape could be appreciated, that is, round. As the rotation movement is constant, a centrifugal force is generated responsible for flattening the zone of the poles or the axis of the Earth and widening the area of the equator. Because of the rotation movement, the planet is shaped like an ellipse or geoid.
- The Cardinal points. As the planet performs the movement of rotation from the west to the east and the Sun is at a fixed point, from Earth it is seen peeking from the east at dawn and is hidden by the west at sunset. This data is useful for locating the cardinal points in case of not having a compass.
- The magnetic field of the Earth. The rotation movement generates a magnetic field or energy that protects the Earth from solar radiation through the atmosphere (layer composed of gases and surrounding the Earth). While the planet and living things need the light and heat of the Sun, some of its rays are harmful. This magnetic field causes a stream of particles in the atmosphere that blocks them and does not allow them to reach the earth's surface.
Earth's rotation speed
The speed of the earth's rotation varies depending on the area of the planet where it is calculated. From the equator, that is, the imaginary line that marks the maximum circumference of the Earth, the route is 1, 700 km per hour.
As you move away from the equator towards the poles, the speed is slower . For example, at the point located at 45 ° north latitude, the rotation speed is 1, 000 km per hour. On the poles, where the imaginary axis passes, the speed is zero or 0 km per hour.
The movement of translation takes place between two bodies, and then when the first one turns over its orbit around the second. In the case of the Earth, it consists in turning around the Sun. Our planet takes 365 days and 6 hours to complete that translation journey.
When the movement of the Earth's movement interacts with the movement of rotation, phenomena occur as the succession of the seasons of the earth. year, and the duration of the day and night.
See more: Earth transfer.