Knowledge of the earth, information about the knowledge of the earth

Earth is one of the eight planets in the solar system, the international name is "Gaia", and it is the third planet in order of being from the sun. It has a natural moon--- the Moon, which form a celestial system --- the Earth-Moon system.

The Earth rotates from west to east while revolving around the Sun. The combination of the Earth's rotation and its orbital motion gives it the day-night alternation and the seasons on Earth (the speed of the Earth's rotation and revolution is uneven). At the same time, due to the gravitational influence of the sun, the moon, and nearby planets, as well as the earth's atmosphere, oceans, and internal materials, the direction of the earth's axis of rotation in space and the earth's body changes.

The inertial centrifugal force generated by the rotation of the Earth causes the spherical Earth to gradually expand from the poles to the equator, becoming the current slightly flattened spheroid, with a polar radius about 21 kilometers shorter than the equatorial radius.

The Apollo spacecraft saw the Earth on the moon and was made up of a series of concentric layers. The Earth's interior has a core (core), mantle (mantle), and crust (crust) structures. The Earth's exterior has a hydrosphere and atmosphere, as well as a magnetosphere, forming a beautiful coat that surrounds the solid Earth.

Earth, one of the eight planets in the solar system, is the third planet in descending order from closest to farthest from the sun. It has a natural satellite, the Moon, and the two form a celestial system, the Earth-Moon system. The Earth is about 4.6 billion years old.

4.6 billion years ago, the Earth was born. Earth's evolution can be broadly divided into three stages.

The first stage is the formation of the Earth's sphere, which is roughly 46 million to 100 million years ago, when the Earth was born, which is very different from the 21st century. Scientists theorize that the Earth began as a red-hot ball of liquid material, mainly magma. Over time, the temperature of the earth's surface continues to drop, and a solid core gradually forms.

The dense material moves towards the center of the earth, and the less dense material (rocks, etc.) floats on the surface of the earth, which forms a earth whose surface is mainly composed of rocks.

The second stage is the Archean and Proterozoic periods. Its time limit is 4200-543 ma. The earth is constantly releasing energy outward, and the water vapor, carbon dioxide and other gases released by the continuous eruption of hot magma constitute a very thin early atmosphere --- primitive atmosphere.

As the water vapor in the primeval atmosphere continues to increase, more and more water vapor condenses into small water droplets, which then converge into rainwater and fall to the surface. And just like that, the primordial ocean was formed.

The third stage is the Phanerozoic period, which lasts from 543 mA to the present. The duration of the Phanerozoic is relatively short, but during this period, the organisms and their flourishing, the geological evolution is very rapid, the geological processes are rich and colorful, and the geological bodies are all over the world, widely preserved, which can be observed and studied very well, and are the main research objects of geological science, and the basic theories and basic knowledge of geology have been established.

Earth is one of the eight planets in the solar system, the third planet in order from near to far, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, 100 million kilometers away from the sun. The Earth rotates from west to east while revolving around the Sun. It is 4,04.6 billion years old, and it has a natural satellite, the Moon, which forms a celestial system, the Earth-Moon System.

It originated from the primordial solar nebula 4.6 billion years ago.

The Earth's equatorial radius is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40076 kilometers. The surface area of the earth is 100 million square kilometers, of which 71% is oceans and 29% is land.

The interior of the earth has a core, mantle, and crust structure, and the outside of the earth has a hydrosphere, atmosphere, and magnetic field. The Earth is the only celestial body in the universe where life is known to exist, and it is home to millions of living beings, including humans.

More than 90% of people don't know anything about the earth! How many do you know?

Earth is one of the nine planets in the solar system, and is the third planet in descending order from closest to farthest from the sun. It has a natural satellite --- the Moon, which form a celestial system --- the Earth-Moon system.

The Earth rotates from west to east while revolving around the Sun. The combination of the Earth's rotation and its orbital motion produces the alternation of day and night and the changing seasons on Earth. The speed at which the Earth rotates is uneven.

At the same time, due to the gravitational effects of the sun, moon and planets, as well as the various effects of the atmosphere, oceans and internal materials of the earth, the direction of the earth's axis of rotation in space and the earth itself must change. The inertial centrifugal force generated by the rotation of the earth causes the spherical earth to gradually expand from the poles to the equator, becoming the current slightly flattened spheroid, with a polar radius about 21 kilometers shorter than the equatorial radius.

The Earth as seen by the Apollo spacecraft The Earth as seen by the Apollo spacecraft The Earth rises above the horizon of the Moon, and the Earth can be seen as consisting of a series of concentric layers. The Earth's interior has a core, mantle, and crust structure. The Earth's exterior has a hydrosphere and atmosphere, as well as a magnetosphere, forming a coat that surrounds the solid Earth.

Earth, as a planet, originated from the primordial solar nebula 4.6 billion years ago.

Basic data on the planet.

The radius of the equator is 6378140 meters.

Flattening factor. Quality grams.

The average density is gram cm3

Surface gravitational acceleration (equator) cm sec2

Surface gravitational acceleration (polar) cm sec2

Rotation period: 23:56:4 (mean solar time).

The semi-long diameter of the orbit is 149597870 km.

Eccentricity of the orbital revolution.

The orbital period is 1 sidereal year.

Yellow and red angle 23 degrees 27 minutes.

What grade are you? Wouldn't it be a little more esoteric.

For information on the knowledge of the earth, it is recommended that you buy a juvenile encyclopedia, in which the knowledge of the earth is written in great detail.

4.6 billion years ago, the Earth was born. Earth is one of the eight planets of the solar system1

The Earth's surface is 5.1 billion square kilometers, of which 71% is oceans and 29% is land, and the Earth is blue when seen from space

The radius of the Earth is about 6,400 kilometers.

Earth's mass: m = grams.

Average radius of the Earth: = meters.

Equatorial radius = km.

Polar radius = km.

Average radius = km.

Equatorial circumference = km.

Latitude 1° length = km (at latitude).

Longitude 1° length = km.

Standard atmospheric pressure p0 = 760 mmHg.

The speed of sound in the atmosphere (0 degrees) v = meter seconds.

Sound velocity in the atmosphere (room temperature) v = 340 m sec Magnetic field strength on the Earth's surface 5 10-5 Magnetic pole of the Earth: North magnetic pole: 76°N, 101°W;

South magnetic pole: 66°S, 140°E

Acceleration due to gravity on the Earth's surface (45°) g = meters and seconds2 Earth surface area = square kilometers.

Land area = square kilometers (of total surface area.)

Ocean area = square kilometers (% of total surface area.)

Earth's volume = cubic kilometers.

Average density of the Earth = gram·cm-3:

The age of the Earth is 4.6 billion years.

The Earth's surface detached from the velocity of kilometers in seconds.

Optical travel difference constant (j2000) k ="

Yellow Crossing Angle (J2000) 23°26'21".448 ecliptic diameter total precession (J2000) p = 5029"0966 (per century) precession cycle 25800 years.

The average orbital speed is kilometers in seconds.

Countless of them, which kind do you want, tell me.