What is the Earth? What substance is it made of?

As for "what is the Earth", we need to understand it from two major aspects:

1. The Earth is the homeland on which we humans depend for survival and is the only planet in the solar system that has The planet of life;

2. The Earth is one of the eight planets in the solar system and the terrestrial planet with the largest diameter, mass and density in the solar system.

It goes without saying that from the known understanding of mankind's deep exploration of the universe ("New Horizons" flew by the asteroid "Tianya Haijiao" in the Kuiper Belt), the distance from "Tianya Haijiao" to the sun is about 6.5 billion kilometers (approximately 1.6 billion kilometers farther than the distance from Pluto to the sun). In the solar system, the earth is about 150 million kilometers away from the sun. It can be said that it is neither far nor close, neither cold nor hot, and there is still life on the earth. Water is indispensable. At the same time, there is a thick layer of atmosphere on the earth, which protects the earth at all times. Therefore, the earth is the home of millions of species of creatures, including us humans, and the earth has naturally become the only living thing in the solar system. Planet and the only celestial body in the universe currently known to contain life.

We all know that the solar system is centered on the sun and a collection of all celestial bodies bound by the gravitational pull of the sun. The solar system includes eight major planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, as well as at least 173 known natural satellites, 5 identified dwarf planets, and hundreds of millions of small planets in the solar system. Celestial bodies. As one of the eight planets in the solar system, the Earth is also the terrestrial planet with the largest diameter, mass and density in the solar system.

As for the material composition of the earth, we need to focus on understanding the structure of the earth:

Similarly, through study, we know that the earth is an irregular elliptical sphere that is slightly flattened at the poles and slightly bulging at the equator ( In general studies and researchers, the default is a positive "sphere" (such as the commonly used globe and other models). Its internal structure is a concentric circle structure, which is divided into crust, mantle, and core from the surface to the center of the earth. Each The material composition of the layers is different.

1. Crust

The solid outer shell below the surface of the earth and above the Moho surface is called the crust. Because there are various landform types, oceans, rivers, lakes, etc. on the earth, the crust The thickness is different, showing the pattern that the higher the altitude, the thicker the crust; the lower the altitude, the thinner the crust. In addition to sedimentary rocks, the material composition of this layer of the earth is basically granite, basalt, etc.

2. The mantle

The mantle is mainly composed of dense rock-forming materials. It is the largest and most massive layer inside the earth. The average thickness of the earth's mantle is about 2,900 kilometers. Affected by the internal activities of the earth, the material components of the mantle at different depths also have plasticity.

3. Earth's Core

The Earth's core is the innermost layer of the Earth. Its material composition is mainly iron and nickel, so it is also called the "iron-nickel core". Since this layer is the innermost layer of the Earth, it is divided into the inner core and the outer core. It is speculated that the outer core may be composed of liquid iron, and the inner core is considered to be very rigid.

The core, mantle, and shell inside the earth, as well as the hydrosphere, atmosphere, and biosphere outside the earth, all together constitute the "planet" we live in.

For more information, you can follow @地里的事 to learn more!

The Earth's crust is mainly composed of quartz (oxide of silicon) and other silicates like feldspar. As a whole, the chemical element composition of the earth is: 34.6 Iron 29.5 Oxygen 15.2 Silicon 12.7 Magnesium 2.4 Nickel 1.9 Sulfur 0.05 Titanium

What is the Earth? What substance is it made of?

What is the Earth? What substance is it made of? I can only give a brief introduction to this issue.

What is the Earth?

The Earth is one of the major planets in the solar system, (Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto). Human beings named the earth, unlike other planets, which are simply synonymous with some star.

It's because the earth has its special characteristics. Among all the planets in the solar system, except for the earth, no sign of life has been found on that planet by humans. The earth is the only place where humans live. It is not surprising that humans have a special liking for the earth and cannot live without it. The earth has the meaning of carrying all things, and the ball has the meaning of going round and round, endlessly.

What materials is the earth made of?

The earth is composed of different materials and more than one hundred elements. Elements make up atoms and molecules, atoms and molecules. Everything in the world is composed of complex combinations. The Earth is composed of a series of concentric layers. The Earth has an interior, core, mantle, and crust structure. Externally, there are water, atmosphere, mountains, magnetism, ultraviolet rays, x-rays, high-energy particles, organisms, etc.

What is it about the earth? On the topic of what material is it made of, I personally think that there are two questions in this question. First, let’s talk about what the earth is: the earth is a planet in the solar system, one of the eight planets currently formed in the solar system, and the sun. The derived "children" are an integral part of the cyclical movement and change of the solar system's materials. They are the base for the conversion of inorganic materials into organic materials in the solar system.

They are the natural storehouse of energy materials for the solar system's regenerative energy combustion. The only paradise where active living matter continues to be born and evolve. Let’s talk about what the earth is made of: the original material on the earth is inorganic dust flow material, which comes from the release of large amounts of dust flow material during the continuous nuclear fusion combustion process of the sun. It mainly contains carbon dioxide, nitrogen, and water. The four basic elements (hydrogen and oxygen) and toxic chemicals can also be collectively referred to as: natural solid substances.

The materials on the other seven planets in the solar system are all composed of natural solid matter (dust particle flow material aggregation), which is only formed by the density of the material and the chemical reaction of the material. There are differences in properties. The only exception is the matter on the earth. In addition to having natural solid matter, it also has the natural existence of a large amount of organic matter. The sources of all organic matter on the earth have always been obtained through transformation methods that form the continuous evolution and survival of the biosphere. . Therefore, judging from the current material structure and composition of the earth,

the earth is the place on which we live. Without it, it can be said that no other planet can survive so far.