The reasons for the change of day and night are the constant and cyclical rotation of the Earth around its axis. This process is quite rapid on the scale of the Universe. But we manage to notice it in the dark evenings or watching the morning dawn. Thanks to the rays of the Sun, the surface of the planet warms up, and we can see the changing darkness and light.
The rays of the Sun and the light of the Moon
The reasons for the change of day and night are that the Earth rotates around an axis that we can mentally imagine. But it simultaneously rotates relative to the Sun. This happens during its movement in orbit around the star.
The reasons for the change of day and night are the movement of the Earth along an axis passing through the poles of the planet. She manages to turn around in 24 hours. But around the Sun there is a slower rotation - in 365 days.
The reason for the change of day and night is the rotation of the planet. On different continents, the length of daylight hours is different. For example, in St. Petersburg there is a season of white nights, and polar days can last more than a month.
Due to what is the uneven length of daylight hours?
The duration of the day and night is not the same everywhere due to the fact thatthe imaginary axis of the earth is slightly tilted relative to the sun. Therefore, the rays fall differently on different hemispheres. Thanks to the redistribution of heat, life exists on the planet.
Having time to cool down during the night, the planet warms up during the day. Vital metabolic processes take place. We see the Earth in such a familiar form due to the unique movement of the planet. On different continents, vegetation and wildlife differ due to the length of the day.
The Pole can be in the shade for half a year - this time is called the polar night. Then comes the next six months a day at the pole. While it is night at the north pole, it is day at the south pole, and vice versa.
If there were no usual days?
Due to the fact that the Earth is evenly illuminated by the Sun, there is life on the planet. Let's imagine that it would stop rotating, and there would always be day on one side, and the other would be forever deprived of light. The hemisphere under the Sun would heat up to a temperature at which all living things would dry up.
The second part of the planet would begin to freeze due to lack of sunlight. So in the present we have an ideal planet for life. The diversity of living beings is amazing, and this is only possible due to the rotation of the Earth. The change of both day and night is important, as are the changes in the weather due to the arrival of different seasons.
