Is the earth hollow or solid, and is the earth hollow or solid inside

The earth is solid.

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.

The crust and mantle are bounded by the Moho plane, and the mantle is bounded by the Gutenberg surface between the earth's core.

The earth's crust is the surface layer of the earth, and it is also the place where human beings live and engage in various production activities. The earth's crust is actually composed of many groups of fractured and many blocks of different sizes, and its exterior shows a high and low undulating shape, so the thickness of the earth's crust is not uniform: the average thickness of the earth's crust under the continent is about 35 kilometers, and the thickness of the earth's crust in China's Qinghai-Tibet Plateau is more than 65 kilometers; The thickness of the earth's crust under the ocean is only about 5 10 km; The average thickness of the Earth's crust is about 17 km, which is only a thin layer compared to the Earth's average radius of 6,371 km.

Below the Earth's crust is the Earth's mesosphere, called the "mantle", which is about 2,865 kilometers thick and is mainly composed of dense rock-forming material, which is the largest and most massive layer in the Earth's interior. The mantle can be divided into two layers, the upper mantle and the lower mantle. It is believed that there is an asthenosphere at the top of the upper mantle, which is presumed to be caused by the melting of rocks due to the concentration of radioactive elements, metamorphosis and exothermy, and may be the source of magma.

The part of the mantle above the asthenosphere and the crust together form the lithosphere. The temperature, pressure, and density of the lower mantle all increase, and the matter is a plastic solid.

Below the mantle is the core, which has an average thickness of about 3,400 kilometers. The earth's core can also be divided into three layers: the outer core, the transition layer and the inner core, the thickness of the outer core is about 2080 kilometers, and the material is roughly liquid and can flow. The thickness of the transition layer is about 140 km; The inner core is a sphere with a radius of 1,250 kilometers, and the matter is probably solid, mainly composed of metallic elements such as iron and nickel.

In fact, there is no answer to this question, and human research on the interior of the earth is still in its infancy, and it is not even able to catch up with the level of human understanding of outer space, and many scientific research problems need to be solved to explore the interior of the earth. The "Earth Hole Theory" describes that "the Earth's interior is hollow", but this is only a hypothesis, but most people accept that the Earth is solid. Our textbooks all say that the earth is solid, and geography will be introduced in high school.

However, these are hypotheses, which have not been conclusively proven, but the solid interior of the earth can better explain the geomagnetic phenomena, and the mass and density of the earth.

Don't stand there and talk without backache, the earth is solid? What do scientists say? Can scientists give a reason? You can look at the hollowness of the earth and then make up your mind, okay?

The earth is solid inside. The Earth is a solid sphere made up of the Earth's core, mantle, and crust. The average thickness of the Earth's core is about 3,400 km.

The earth's core can also be divided into three layers: the outer core, the transition layer and the inner core, the thickness of the outer core is about 2080 kilometers, the material is roughly liquid and flowable, and the thickness of the transition layer is about 140 kilometers.

Earth is the third planet in the solar system from the inside and outside, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, about 100 million kilometers away from the sun. The Earth rotates from west to east while revolving around the Sun. There is a natural satellite, the Moon, which forms a celestial system, the Earth-Moon system.

It originated hundreds of millions of years ago from the primordial solar nebula.

The radius of the Earth's equator is kilometers, the polar radius is kilometers, the average radius is about 6371 kilometers, and the equatorial circumference is about 40075 kilometers. The Earth's surface area is 100 million square kilometers, of which 71% is oceans and 29% is land. The main components of the atmosphere are nitrogen and oxygen, as well as small amounts of carbon dioxide and argon.