What are the main components of the planet? What are the ingredients at the center of the earth

Earth composition: three concentric spheres: core, mantle, and crust.

The internal structure of the earth refers to the layered structure of the earth's interior. According to the change in the propagation velocity of ** waves at different depths underground, the interior of the earth is generally divided into three concentric spheres: the core, the mantle and the crust.

The central layer is the core; In the middle is the mantle; The outer layer is the earth's crust.

Earth was formed from the wreckage of the dead planet, which gathered in a huge cloud of filthy gas, which became denser and denser at its center. Later, accretion disks were formed, and small particles began to gather together to form larger and larger substances, and eventually the planet it is today. This process took between 1,000 and 20 million years, and we don't know much about it to this day.

At that time, when the solar system was still just formed and in chaos, a huge Mars-like object collided with the Earth, and the impact was huge. If the object had been any bigger, it would have destroyed the Earth.

Material from Earth is impacted into orbit to form the Moon, which is the largest satellite of the Earth in the solar system. At this time, the earth is simply purgatory, and from time to time it is hit by asteroids, forming numerous volcanic magma and toxic gases. But a big change is about to happen, the earth is cooling, and the water inside the earth is slowly flowing to the surface and forming rain to fall on the earth.

When it is evaporated again, clouds are formed, and a large number of asteroid impacts bring more and more bodies of water to Earth. The volume of all water bodies on Earth is only so much that it is now, 71% of the Earth's surface is water, and 29% is land. 69% of the water is snow and ice, 30% is groundwater, and only about 1% is remaining groundwater.

1. The earth, including land and ocean, the entire surface of the earth, is composed of 71% sea water and 29% land land. The main component of the sea is water, so the largest proportion of substances on Earth are hydrogen and oxygen. However, hydrogen and oxygen mainly exist in the form of water as a compound.

2. The earth mainly includes the outer atmosphere, the crust, the mantle, and the center of the earth, and the core component of the earth's solid material is silica, that is, quartz.

3. The earth includes all kinds of elements and their compounds that have been discovered so far.

The most important elements of the earth are iron, oxygen, silicon, and magnesium, which account for more than 90% of the earth, and are mainly found in the core, mantle, and crust in the form of silicate minerals and metals.

Because the earth has a distinct sphere structure, and the composition of each circle is very different, it is very difficult to comprehensively examine the main components of the earth and their contents.

Scientists have applied geophysical analogies to study the chemical composition and element abundance of the Earth.

I have a rough idea of the main components of the earth.

According to the study, the composition and abundance of various elements on the earth from more to less, in order: ferric, silicon, magnesium, nickel, calcium and aluminum, sulfur, the above 8 elements total. The other elements together account for only the composition of the earth.

Scientists can learn about the history of the Earth based on the rocks and fossils in the strata, as well as what happened at that time. .Stratigraphic studies are closely related to fossil studies.

It is the foundation of geological science and thus becomes a separate discipline – stratigraphy. The Earth has been formed for 4.6 billion years. How do geologists understand the Earth's past history?

An important part of the work is to analyze by layer. Stratigraphy generally refers to layered rocks formed in geological history, including sedimentary rocks, igneous rocks, and metamorphic rocks formed by the metamorphism of both. For example, the age of the oldest sedimentary rock layer on Earth is currently 3.9 billion years ago, which proves that water and atmosphere existed on Earth at least 3.9 billion years ago.

Due to the presence of water, weathered cuttings will settle in the water. Most of the strata formed between 3.9 billion and 2.5 billion years ago are somewhat metamorphic, that is, the rock structure is somewhat deformed, the rock texture is relatively hard, and the rock composition is relatively complex. During this period, extra-large sedimentary iron ore such as Anshan Iron Mine in Liaoning Province was often formed.

During this period, the surface temperature was relatively high, about 70 (now the average is only 15), and it was hypoxic, which was not suitable for ordinary organisms, but suitable for the growth of cyanobacteria and the formation of fossils in the strata. However, due to the small number of species of cyanobacteria at that time, it played little role in stratigraphic division. Sedimentary rocks contain more volcanic eruptions, and the crustal movements that occurred at that time were more and larger, resulting in inconsistencies between the upper and lower strata.

Therefore, the age can only be determined by the radioactive elements in the ground layer. This period is known as the Archean Period. Between 2.5 billion and 100 million years ago, cyanobacteria on Earth reached their heyday.

They often consolidate debris from the surrounding ocean, resulting in spectacular stromatolites or even reefs. In addition, eukaryotic algae and multicellular algae also appeared one by one, and by about 600 million years ago, primitive animals also appeared. But at that time the number and variety of animals were very small, only sponges for sporozoans, jellyfish for coelenterates, worms for annelids.

Due to the relatively weak crustal movement and magmatic activity during this period, the strata formed at that time were less metamorphosed, and geologists can get more information from the strata, such as paleoclimate, paleogeography, paleoenvironment, crustal movement, magmatic activity, etc. .This period is significantly different from Archean in every way, so paleontologists call it Proterozoic.

With the rise of new technologies, such as the application of paleomagnetic technology, geologists have learned from the strata that 1.9 billion years ago, there were very few continental plates on the earth, and they gathered in the northern hemisphere to form the "Pangea".Since 100 million years ago, it was the Phanerozoic, and a large number of organisms appeared. After the Cambrian explosion, a large number of organisms appeared on the earth, and many fossils were formed in the strata, and the newer the strata, the more complex and diverse the fossils of organisms that can be seen.

Scientists can learn about the history of the Earth based on the rocks and fossils in the strata, as well as what happened at that time. .

The most important elements of the earth are iron, oxygen, silicon, and magnesium, which account for more than 90% of the earth, and are mainly found in the core, mantle, and crust in the form of silicate minerals and metals.

Hello, the main components of the earth are iron, oxygen, silicon, magnesium. These major components alone account for more than 90% of the planet.

Earth composition: three concentric spheres: core, mantle, and crust.

The scientific question is quite complex. I suspect that scientists and geography teachers will have a hard time explaining it as well.

The center of the Earth is the core.

The radius is about 3480 kmMainly made of ironNickel elementcomposition。its physical properties with the surrounding mantle.

It is significantly different from the earth's crust. The material of the outer core is in a liquid state, and the inner core is now considered by scientists to be a solid structure.

The interior of the earth, from the surface of Gutenberg to the center of the earth, is called the core. The mass of the Earth's core accounts for the entire mass of the Earth.

, the volume of the entire Earth. According to the changes in the ** wave, it is found that the earth's core also has the difference between the outer core and the inner core. The interface between the inner and outer cores is about 5155 km.

Because the transverse wave of the ** wave cannot pass through the outer core, soIt is generally assumed that the outer core is composed of molten or near-liquid substances composed of iron, nickel, silicon, and other substances. The liquid outer core flows slowly, so it has been speculated that the formation of the Earth's magnetic field may be related to it. Since longitudinal waves are present in the core, the core may be solid.

There is a lot of controversy in the academic community about the material composition of the inner core, and many people believe that dust-burning socks are mainly composed of iron and nickel. But what it is, all this still needs to be explored and proven by Duan Min.

The center of the earth contains many elements including potassium, sodium, calcium, aluminum, iron, zinc, etc.

Air is a mixture, and it is mainly composed of the following components:

1.Nitrogen: volume fraction of about 78 percent;

2.Oxygen: volume fraction about 21 percent;

3.Rare spring-calling gases: helium, neon, argon, krypton, xenon, radon, with a volume fraction of about 100%;

4.Carbon dioxide: volume fraction is about one percent;

5.Other gases: such as sulfur dioxide, nitrogen trioxide, carbon monoxide and other unstable gases, the volume fraction is about;

6.Its senchang substances: such as water vapor, miscellaneous and he, etc., the volume fraction is about 10%.

The above is the latest data for 2017.

The composition of the air is not fixed, and the composition and composition of the air will also change with the change of altitude, air pressure, and region.

The Earth is composed of three parts: the core, the mantle, and the crust.

The internal structure of the earth is a concentric circle structure, which is divided into core, mantle, and crust from the center to the surface. The interface between the Earth's core, mantle, and crust is mainly determined by the rapid change in the propagation velocity of **waves.

Chinese name. Structure of the Earth.

Category. Geographical nouns.

The Earth is a special physicochemical system, which is different from other planets in the solar system, not only the long-term role of the biosphere and life, but also the atmosphere formed by liquid hydrosphere and nitrogen-oxygen, and the plate movement of the solid geosphere. This determines the unique characteristics of material movement and element behavior of the earth system.

Consists of atmosphere, hydrosphere, lithosphere. The atmosphere is mainly composed of dry air, water, solid magazines, water. The rocks are mainly composed of oxygen, silicon, aluminum, iron and other elements.

The earth is, a planet in the solar system, and he has seven brothers, they are gold, wood, water, fire, and Saturn, plus Uranus and Neptune, and there are seven planets, and they love each other, and the earth is composed of three concentric spheres, namely: the crust, the mantle, and the core? Its center is the Earth's core; The outer layer is the earth's crust. In the middle is the mantle; Thank you.

One Earth is composed of land and sea.

2. 71% of the earth is oceans and 29% is land.

Third, there is already a crust, mantle and core within the earth.

HK eats junk calories, ah loss.

The thickness of the earth's crust in the solid state varies greatly, and the crust in the oceanic area is thinner, averaging about 7 km thick; The continental crust is much thicker, averaging about 40 kilometers thick;

The geosphere is also solid, but in the upper part of it there is a very small area of melt called the asthenosphere, and the top of the geophilic and the entire crust on it is called the lithosphere.

As for the outer core, it is liquid, while the inner core is solid.

These different strata are bounded by discontinuities, the most famous being the Mohs discontinuum between the earth's crust and the geographic.

mohorovicic

discontinuity)。

The Earth's mantle occupies the main mass of the Earth, and the Earth's core is secondary, and the space in which we live is only a very small part of the entire Earth.

Mass, 10 kilograms to the 24th power: atmosphere.

Ocean. Crust.

Mantle. Field nucleus =

Inland nuclear. The main component of the Earth's core is iron.

or iron-nickel), but there may also be some lighter material, and the temperature at the core of the earth is about 7,500 K, which is higher than the surface temperature of the sun; The main components of the lower part may be silicon, magnesium, oxygen, plus some iron, calcium and aluminum; The upper mantle is mainly composed of olivine and pyroxene.

iron-magnesium silicate rocks), but also calcium and aluminum.

Although material from the upper mantle is sometimes brought to the surface by volcanic lava, we are still unable to reach the main part of the solid Earth, and the current seafloor drilling operations have not yet penetrated the earth's crust.

The composition of the earth's crust is mainly quartz.

silica) and silicates such as feldspar.

As a whole, the weight percentage of the geochemical composition is as:

Iron, oxygen, silicon, magnesium, nickel, sulfur, titanium.