What are the geographical phenomena produced by rotation?

The eastern and western hemispheres alternate day and night; time differences in different places; object bias; The sun, moon and stars rise in the east and set in the west; the periodic movement of the celestial poles; caused the transformation of the North Star; Systematic changes occur in the Earth's equatorial plane and the celestial equator; The equinoxes and solstices move westward on the ecliptic at a rate of 50 seconds and 29 seconds per year; Make the return year less than the sidereal year.

Geographical phenomena of the Earth's rotation: the alternation of day and night and the difference in time. The Earth's rotation is an important form of motion of the Earth, and it takes 23 hours and 56 minutes for the Earth to rotate in one cycle, and the rotation period increases or decreases by 3 thousandths to 4 thousandths of a second every 10 years.

The Earth rotates from west to east on its axis of rotation, rotating counterclockwise from the North Pole and clockwise from the South Pole. The Earth's axis of rotation is angled to the ecliptic plane, perpendicular to the equatorial plane.

The Earth's rotation is an important form of motion of the Earth, with an average angular velocity of rotation in degrees and a linear velocity of 465 meters at the Earth's equator. It takes 23 hours and 56 minutes for the Earth to rotate around and increases or decreases by 3 to 4 thousandths of a second every 10 years.

The geographical phenomena produced by the rotation of the earth are:

1. The earth is a non-luminous and opaque sphere, and the sunlight can only illuminate half of the globe at the same moment, the half of the earth illuminated by sunlight is daytime, and the half of the earth that is not illuminated by sunlight is the dividing line (circle) between the night, day hemisphere and the night hemisphere, which is called the morning and dusk line (circle).

2. Change of local time and district time: When local, each place is different, so it can only be calculated by using one meridian line. Zone Time:

Since Magellan's circumnavigation of the world, there has been the problem of different dates in the eastern and western hemispheres, so there are 24 time zones, the middle time zone or the lack of a special one, the West 12 Zone and the East 12 Zone are the same time zone.

3. Deflection in the direction of horizontal motion of the object: under the influence of geostrophic deflection force, the object moving horizontally will be biased to the right of the direction of motion in the northern hemisphere and to the left of the direction of motion in the southern hemisphere. The direction of the geostrophic deflection force is perpendicular to the direction of the object's motion.

The greater the velocity, the greater the geostrophic deflection force. Only horizontal motion along the equator is not affected by geostrophic deflection forces.

4. The influence of rotation on the shape of the earth: the inertial centrifugal force generated by the rotation of the earth makes the earth gradually expand from the poles to the equator, becoming the shape of the slightly flattened ellipsoid.

About the Earth since **

The Earth's rotation is the rotation of the Earth around its axis of rotation from west to east, counterclockwise from the North Pole and clockwise from the South Pole. The rotation of the earth produces the phenomenon of day and night, with the hemisphere facing the sun being day and the hemisphere facing the sun being night. The local time varies between different degrees of longitude on Earth, and the local time varies by one hour every 15 degrees of longitude.

The direction of the object's horizontal motion is biased, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The inertial centrifugal force generated by the rotation of the earth causes the earth to gradually expand from the two stages to the equator, becoming a slightly flattened spheroid.