What the earth looks like now, what the earth looks like

The earth is round, and so are the other planets. The water droplets we see are also round in the air. The bubbles are also round.

Due to the surface tension of the liquid, the bubbles and small water droplets are round.

Why the earth is round begins with the birth of the earth. The original universe was a high-temperature, high-energy, high-density substance, and due to its large **, various planets were produced. At that moment, those planets were all hot and liquid, and also due to the action of surface tension, they were all round.

After hundreds of billions of years of cooling, the temperature on the surface of some planets gradually decreased, and then proteins were slowly produced, and life was born, and this planet is the Earth. In the various movements that followed, there was no reason to change it to other shapes, so it has always been in the circle until now.

But the Earth is not a standard sphere. The Earth is an irregular spheroid with slightly flattened poles. The radius of the Earth's equator (a) is 6378 140 km, the radius of the Earth's poles (b) is 6356 755 km, and the average radius of the Earth is (3 a2b) km.

From these data, we can see that the Earth's equatorial radius is large, why? That's because the centrifugal action in the middle part of the Earth's rotation around the Earth's axis is large, which makes the radius in the middle, that is, near the equator, larger.

In addition, the continuous changes in the earth's crust form the causes of mountains and oceans on the earth's surface, as well as **, volcanoes, etc., which will cause differences in the earth's surface.

The Earth is an irregular sphere with slightly flattened poles and a slightly bulging equator, with an average radius of 6,371 kilometers, a maximum circumference of about 40,000 kilometers, and a surface area of about 5.1 billion square kilometers. Because the equatorial part is bulging, the North Pole is pointed, and the South Pole is concave, it is shaped like a "pear".

Due to the complexity of the earth's natural surface, it took a long time to divide the earth's surface into several regions in order to accurately study its shape, carefully study the coordinates of the surface points in each area, and finally synthesize them.

What makes the earth unique:

1. The right ingredients: A planet needs liquid water, energy, and elements such as carbon, hydrogen, and oxygen for the life forms we are familiar with to thrive.

2. Suitable crust: gas giants and lava planets are not suitable for life. Fortunately, the Earth has the right distribution of elements that ensures a hot inner metal core and an outer rocky mantle.

3. Appropriate temperature: The necessity of the presence of liquid water also means that planetary temperatures must allow the substance to remain liquid in certain regions.

4. The Right Moon: Our Moon ensures the stability of the climate by minimizing changes in the tilt of the planets. If our planet is not tilted, there is no change of seasons. Similarly, excessive tilting can lead to extreme climates.

5. Suitable stars: The sun provides the earth with the energy for life, and it is quite stable.

6. Appropriate magnetic field: The Earth's protective magnetic field plays a vital role in protecting life from the sun's deadly radiation.

7. Suitable neighbors: Jupiter protects Earth from constant asteroid bombardment. Without the gas giant nearby, the Earth would have been hit by asteroids and comets 10,000 times more often.

Earth is the planet we live on, and it's also the home we live in. The shape of the Earth resembles an ellipsoid, with the longest diameter at 12,756 km in the equatorial square direction and the shortest at 12,714 km at the pole. The Earth's surface is covered by water and land, with land accounting for 29% of the Earth's surface area and water covering 71%.

The Earth's atmosphere is made up of gases such as nitrogen, oxygen, argon, etc., which provide us with the oxygen and air necessary to breathe and survive.

The earth has an axis of rotation that rotates once a day from west to east, which is what we often call a day. The Earth's rotation creates the phenomenon of day and night, with the sun shining on the Earth during the day and the Earth's own light at night. In addition, the Earth also has an orbital orbit that revolves around the Sun and makes one revolution per year.

The rotation of the earth creates the phenomenon of the alternation of seasons, and as the earth revolves around the sun, different seasons will have different climate and weather changes.

The Earth's surface is covered by land and sea. The land mass includes seven continents and tens of thousands of islands, the largest of which is Asia and the smallest is Australia. The oceans on the Earth's surface are divided into five oceans: the Pacific, Atlantic, Indian, Antarctic, and Arctic Oceans.

There are many kinds of organisms in the ocean, including fish, seaweed, corals, etc., which have an important impact on the balance of the earth's ecosystem and the survival of human beings.

The Earth's atmosphere is mainly composed of nitrogen, oxygen, and small amounts of gases such as argon and carbon dioxide. The atmosphere prevents dangerous substances such as cosmic rays trapped in the air and solar winds from entering the Earth, while also providing us with the right climate and air. The ozone layer in the atmosphere filters out the sun's ultraviolet rays and protects life from ultraviolet rays.

In conclusion, the Earth is the planet we are on, and it is an ellipsoid covered by land and oceans. The earth has a rotational and revolving motion, resulting in phenomena such as day and night, seasons, etc. The Earth's atmosphere provides us with the oxygen and air necessary to breathe and survive, while also protecting us from dangerous substances such as cosmic rays and solar wind.