Why the Earth Is Round Why is the Earth Round

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

Solution explained.

1. Surface tension A drop of liquid suspended in space is spherical! This is due to the action of surface tension.

The Earth is almost liquid except for the solid surface of the Earth, which is a solid surface, and the Sun is even more fluid. Due to the same principle, it is spherical.

Interpretation. 2. Gravitational force. If not affected by external forces, all objects have a tendency to concentrate towards the center under the action of gravitational force. The most concentrated knots.

It's spherical! Although the surface of the earth is solid, because solids are also deformable, and solid fragments can move, these.

all make it possible to transform it into a spherical shape.

The activity of energy in the Earth's interior makes the Earth irregularly shaped. However, the stones of the mountains are rolled down from a high place by the gravitational pull of the earth (gravitational pull), and the rivers carry the sediment from the high to the low-lying oceans (the rivers also flow by the gravitational pull of the earth)...These are all examples of concentration towards the center, and they all turn the earth from irregular to spherical.

If the Earth's interior ceases to move, it is possible that in many billions of years the Earth will become a very standard spherical shape (with the exception of centrifugal force and the gravitational pull of other celestial bodies).

Many asteroids, due to their own small mass, resulting in their own gravitational force is relatively small, and the star is generally composed of relatively hard solid rock, it is difficult to complete the process of moving to the center under the action of its own gravity, so their shape is strange, oval, rod-shaped. Many.

The Earth is not round, the Earth's equatorial radius is a kilometer, and the polar radius is 6356076 kilometers, because their data is not much different, so the Earth looks round. To be precise, the Earth is a triaxial ellipsoid.

The earth is not round, it should be an approximate sphere with slightly bulging poles and a slightly flattened equator!

That's right! It was created to be round!

Why isn't it round?

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

An elliptical sphere with slightly flattened poles.

When the earth rotates, it will produce centripetal force and centrifugal force, the farther away from the center of the earth, the smaller the centripetal force, the greater the centrifugal force, and the matter will form layers of layers along the earth by virtue of external gravity, and the force of each substance will be balanced as a whole, so it can remain unchanged until it stays obediently.

The earth revolves around the earth's axis, and the poles are relatively small and closer to the center of the earth because they are on the earth's axis.

1. The movement of objects in the universe is always affected by various gravitational forces, so they both revolve and rotate, and the centrifugal force of rotation shapes them into a spherical shape.

2. It seems to have something to do with the tension of the object, just like a drop of water will appear spherical in a vacuum...... state

The Earth was created long ago when rocks in the solar system collided with each other to form planets. From the beginning of its formation until the present, the earth has been mainly composed of liquid rocks. In space, where gravity is minimal, liquid matter will automatically form a spherical shape.

This has been demonstrated by experiments conducted by astronauts in the space environment with substances such as water, fruit juice and liquid metal. The Earth is a huge liquid sphere at a considerable distance from the Sun, which gradually forms a circle as it moves through space. Asteroids and small stars such as the moons of Mars are so weak in their gravitational pull that they cannot form a circle once they form a solid star.

Due to the large size of the Earth, its gravitational pull is strong enough to make itself circular. If there is no tectonic plate movement that makes the peaks taller, gravity will make the Earth become more and more round.

When the universe was formed. Many heavy metals are concentrated. And the core of the earth was formed.

And then attract non-heavy metal substances such as dust, but what is an elliptical shape in the earth position is related to the characteristics of the circle and its rotation. When the core of the earth reaches a certain weight. The gravitational pull will cause the external force to carve.

Because of the depression. Approaching the center of a metal with a heavier mass. And the gravitational pull at the bulge.

Because there is the thickness of the earth's crust. Whereas, the gravitational pull is weaker. (Lower depressions under gravity.)

It can't attract magma) And because almost all the metal materials in the center of the earth will emit nuclear energy in the early stage. The enormous heat turns the earth into a liquid state. This force is even stronger.

This causes the magma to fill in from the bulge to the recess. It also makes the crust at about the same distance from the center of the earth everywhere. (The distance from any point on the surface of the circle to the center of the circle.)

same) while the Earth has a center of mass. It already rotates. The centrifugal force causes the Earth's equator to be slightly thicker than the meridian circle.

That is, to make the earth incomplete and circular. Rather, it is an ellipse.

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

Generally, liquid substances are spherical due to the combined action of cohesion and surface tension, because such a shape is the most stable, and the energy consumed to maintain such a shape is the least. 40 billion years ago, the Earth was liquid. Due to the surface tension, it is spherical.

The same is true for other planets, the Earth's core is composed of heavy metal liquids, and 70% of the Earth's surface is oceans, so the Earth is naturally round.

In fact, the earth is not round or elliptical, the earth is a sphere with the north pole slightly protruding outwards and the south pole slightly concave inward, similar to a pear shape.

Why is the earth round?

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.

The Earth is a sphere, but due to gravity, it is not a perfect sphere, and the equator bulges outwards to form a "spare tire" structure. In fact, the polar radius of the Earth is kilometers, while the radius of the equator is kilometers.