Although there are many things you probably already know, there are many things you never knew about the Earth. Millions of people around the world celebrate the International Earth Day. United Nations uses this day to raise the awareness of the importance of preserving the natural resources of our planet and facing the challenges of climate change. The date chosen by the UN to honor the Earth recalls the events of April 22, 1970, when 20 million people took to the streets of major cities in the United States to protest the damage that human activities were causing in the environment. While thinking about saving and protecting our planet, how many of us actually know a lot about it? Now, there are many things that we know for sure about and others that we are not certain about. It is the time to find it all out.
List of the 10 things you never knew about the Earth:
10The Earth is not a perfect sphere
Usually, our planet is represented as a perfect sphere, but that is not its precise form. The Earth is mounted on the poles, so its shape is sewn on a circumference. It is a very interesting fact, considering that everything we learned is based on one shape that isn’t actually correct. All the explorers and scientists explored this information hence it is very important.
As with other planets, the effect of gravity and the centrifugal force are produced by the rotation on the axis generates polar flattening and equatorial widening. Thus, the diameter of the Earth at the equator is about 43 kilometers greater than the diameter of one pole.
9Water covers more than 70% of the Earth
On Earth, water is in the solid, liquid and gaseous state. You may know this if you have studied a lot in school. If not, this is one of the things you never knew about the Earth. We cannot blame you because, from our perspective, there is way more land. However, it is not like that at all and you can see it by only taking a closer look at the globe.
The water covers three-quarters of the land surface in the form of marshes, lakes, rivers, mares and oceans. These contain about 97% of all water on the planet. Taking this data and the predictions into the consideration, the Earth might even be completely made of water in the future.
8The border between the Earth and space is to 100 kilometers of altitude
It is considered that the border between the atmosphere and space is in Line of Karman that is to 100 km of altitude. We are certain that is one of the things you never knew about the Earth.
75% of the atmospheric mass is in the first 11 kilometers of height from the surface of the sea. Space is truly enormous and represents the real mystery. Can you imagine that only 100 kilometers away feel like infinity?
7Earth is an iron planet
The Earth is the densest and the largest planet in the Solar System.The most present chemical elements are iron (about 32%), oxygen (about 30%), and silicon (about 15%).
Scientists believe that the core of the Earth is composed mainly of iron (about 88%). The actual things that the Earth contains are not something that interests just everyone. If you are one of those who would like to discover more about our planet, this information is probably one of the things you never knew about the Earth.
6Earth is the only known planet with life
The Earth is the only astronomical body in which we have been able to verify that there is life. There are currently about 1.2 million species of animals listed, although scientists believe that there is only a small percentage of the total. The Earth has formed about 4500 million years ago and the life on it is estimated to date from back then as well. The physical properties of the Earth, its geological history, and its orbits have been around for millions of years.
Although it seems exciting to think of other forms of life somewhere far away, scientists didn’t discover anything so far. Until that time comes, the Earth will remain as the inhabited planet.
5Gravity is not the same everywhere in the world
Our planet does not really have the form of the sphere, but a form closer to an ellipse. In addition, the ground is irregular and the mass of our planet is not distributed in a perfectly homogeneous way.
This causes variations in the value of the gravitational field. Thus, for example, displacements from the equator to the poles gradually increase the intensity of the gravitational field, although the sea of difference is imperceptible to humans.
4Earth is a planet of extremes
Our planet is full of contrasts. The variety of its geographical areas and its climates makes practically every region have its own peculiarities. There are several candidates for being the hottest places on Earth, but the place with major temperature recorded is located in Death Valley of the USA, where on July 10, 1913, the thermometer rose to 56, 7 ° C.
At the other end is Antarctica. At the Vostok station on 31 July 1983 the measuring instruments reach -89.2 ° C. It makes it one of the things you never knew about the Earth. You probably couldn’t imagine any place being that hot, especially if you are living in a colder area.
3The largest living structure on Earth
The Great Barrier Reef, off the coast of Australia, is the largest unique structure made up of living organisms on the planet. It goes to the extent that it is the only one that can be seen from space. It extends for more than 2,000 kilometers and hosts thousands of marine species. In 1981, it was declared Patrimony of the Humanity by Unesco.
2The Earth is the only planet in the solar system with active tectonic plates
The movement of these plates makes the surface of our planet in constant change, being responsible for the formation of mountains, seismicity, and volcanism. They are also the reason of many earthquakes and catastrophes.
The cycle of these plates also plays an essential role in the regulation of terrestrial temperature, contributing to the recycling of greenhouse gasses such as carbon dioxide, through the permanent renovation of the ocean floor. It is important to understand the importance of these plates. They can change significantly our lives during their activity. In case you didn’t study further about our planet, this fact is one of the things you didn’t know about the Earth.
1Earth has a protective shield
The Earth’s magnetic field acts as a shield against the continuous bombardment of particles from the Sun. This field extends from the inner core of the Earth to the edge where it meets the solar wind. Among other things, the magnetic field also helps the orientation of some animals and ours, with the use of compasses. In case you didn’t know so far, this is the most important thing you never knew about the Earth.
Top 10 Earth Secrets
- Earth has a protective shield
- The Earth is the only planet in the solar system with active tectonic plates
- The largest living structure on Earth
- Earth is a planet of extremes
- Gravity is not the same everywhere in the world
- Earth is the only known planet with life
- Earth is an iron planet
- The border between the Earth and space is to 100 kilometers of altitude
- Water covers more than 70% of the Earth
- The Earth is not a perfect sphere