How is the phenomenon of alternating day and night formed?

The alternation of day and night is caused by the rotation of the earth.

The alternation of day and night is caused by the rotation of the earth. The earth is a sphere, which rotates around its own axis. This rotation is called the rotation of the earth. The period of the earth's rotation is one day, that is, 24 hours.

Due to the rotation of the earth, the sunshine time in different parts of the earth is different, thus forming the phenomenon of alternating day and night. On one side of the earth, when the earth rotates towards the sun, people on this side can see the sun, which is daytime; When the earth rotates to the opposite side of the sun, people on this side can't see the sun This is night.

The alternation of day and night is caused by the inclination between the earth's rotation axis and the male rotation axis. In the northern hemisphere, the inclination angle between the earth's rotation axis and the common rotation axis is 66.5 degrees, so the days in summer are long and the nights are short in the northern hemisphere, but the opposite is true in winter. In the southern hemisphere, the situation is just the opposite. The alternation of day and night is the result of the earth's rotation, which makes the sunshine time on the earth uneven, thus forming different seasons and weather changes.

The influence of the earth's rotation on the earth;

1, alternation of day and night: the rotation of the earth has caused the phenomenon of alternation of day and night in our daily life. This is because the rotation of the earth makes every point on the earth's surface exposed to the sun for different lengths of time, thus forming the alternation of day and night.

2. Seasonal changes: The rotation of the earth also leads to seasonal changes. Because the angle and duration of direct sunlight are different in different seasons during the earth's revolution, there are obvious differences in temperature, climate and biological activities in different seasons.

3. Tidal phenomena: The rotation of the earth will also cause tidal phenomena. The gravity of the moon and the sun will lead to the periodic fluctuation of the water on the earth, which is called tide.

4. Earth's magnetic field: Earth's rotation is also related to the Earth's magnetic field. The metal elements in the earth (such as iron and nickel) will generate currents under the action of the earth's rotation, and these currents will generate magnetic fields to protect the earth from the solar wind.

5. Meteorological phenomena: The rotation of the earth also affects the occurrence and distribution of meteorological phenomena. For example, the movement and change of meteorological phenomena such as tropical cyclones and frontal rain belts are all related to the earth's rotation.