What are the basic knowledge of the earth?

1. The Earth is the third planet in the solar system from the inside to the outside, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, and it is the only home for mankind. The human beings who live on the earth often refer to the earth as the world.

2. The earth is also known as the "earth". The third planet in the solar system close to the Sun is a triaxial ellipsoid with slightly flattened poles and a slightly bulging equator. Surrounded by an atmosphere, the surface is land and sea, with humans, flora, fauna and microorganisms.

3. The Earth interacts with other celestial bodies in outer space, including the Sun and the Moon. Currently, it takes the Earth to complete one revolution around the Sun in times times the amount of time it rotates, and this time is called a sidereal year, which is equal to a solar day. The tilt of the Earth's axis is tilted to the perpendicular line of the orbital plane, resulting in a seasonal change on the planet's surface with a period of 1 sidereal year.

4. The earth's mineral and biological resources maintain the survival of the global population. Humanity on Earth is divided into about 200 independent sovereign countries and regions, which are connected to each other through diplomacy, tourism, ** and war. Human civilization has had many views on this planet, including that God created human beings, that the heavens are round and that the earth is the center of the universe.

5. The surface of the earth is divided into several hard parts, or plates, which move on the surface of the earth in geological time cycles. About 71% of the Earth's surface is oceans, and the rest is divided into continents and islands. Liquid water is necessary for all known life, but does not exist on the surface of all other planets.

Categories: Education, Science, >> Science & Technology.

Analysis: Earth is one of the nine planets in the solar system, and it is the third planet in order of proximal to farther. 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).

Orbital half-length diameter ** km.

Eccentricity of the orbital revolution.

The orbital period is 1 sidereal year.

Yellow and red angle 23 degrees 27 minutes.

Learn the basics of the planet. The earth is our home to life, and there are many basic knowledge on the earth that we have never learned, and these knowledge are very interesting. Next, I will take you through the relevant content about the basic knowledge of understanding the earth.

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.

Summary. Hello dear <>

We'll be happy to answer for you. The knowledge of the earth has: The knowledge about the earth has:

1. The Earth is the third planet from the Sun and the only celestial body known to nurture and support life. 2. The surface of the earth is approximately a land mass of continents and islands, and the rest is covered by water, mostly by oceans, bays, and other saltwater bodies, but also by lakes, rivers, and other fresh waters, which together form the hydrosphere. 3. The Earth's atmosphere is mainly composed of nitrogen and oxygen.

The tropics receive more solar energy than the polar regions and redistribute it through atmospheric and oceanic circulation. Greenhouse gases also play an important role in regulating the surface temperature. 4. The gravitational pull of the Earth interacts with other objects in space, especially the Moon, which is the only natural satellite of the Earth.

5. It takes about a few days for the Earth to revolve around the Sun. The Earth's axis of rotation is tilted relative to its orbital plane, thus producing seasons on Earth. The gravitational interaction between the Earth and the Moon causes tides that stabilize the direction of the Earth on its axis and gradually slow down its rotation.

Knowledge about the earth.

Hello dear <>

We'll be happy to answer for you. The knowledge of the earth has: Zaomin's knowledge about the earth has:

1. The Earth is the third planet from the Sun and the only celestial body known to nurture and support life. 2. The surface of the earth is about a land of continents and islands, and the rest is covered by water, mostly by oceans, bays, and other bodies of saltwater, but also by lakes, rivers, and other freshwaters, which together form the hydrosphere. 3. The Earth's atmosphere is mainly composed of nitrogen and oxygen.

The tropics receive more solar energy than the polar regions and redistribute it through atmospheric and oceanic circulation. Greenhouse gases also play an important role in regulating the surface temperature. 4. The gravitational pull of the Earth interacts with other objects in space, especially the Moon, which is the only natural satellite of the Earth.

5. It takes about a few days for the Earth to revolve around the Sun. The Earth's axis of rotation is tilted relative to its orbital plane, thus producing seasons on Earth. The gravitational interaction between the Earth and the Moon causes tides that stabilize the direction of the Earth on its axis and gradually slow down its rotation.

The Earth is the third planet from the Sun, and Sun Xiang is the only celestial body known to mankind that nurtures and supports life. The surface of the Earth is roughly a land mass made up of continents and islands. The remainder is covered by Kaiqing water, mostly by oceans, bays and other saltwater bodies, but also by lakes, glaciers, rivers and other freshwater bodies, especially glaciers, which together form the hydrosphere.

Most of the Earth's polar regions are covered in ice. The Earth's outer layers are divided into several rigid tectonic plates that migrate to the surface over millions of years, while the interior remains active, with a solid iron core, a liquid outer core that generates the Earth's magnetic field, and a convective mantle that drives plate tectonics.