Pandemics (mass epidemics)
Pandemic is an epidemic that is massive in nature. That is, an epidemic that can spread across territories of many can hit entire continents.countries that The most famous pandemics -…

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Pollution of reservoirs
Water pollution is a serious environmental problem. Indeed, water is essential for the existence of all living organisms, including humans. But its contamination makes it impossible to use water for…

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The structure of the mountains and their classification
Mountains are uneven parts of the land, rising steeply over the adjoining areas of 500 meters or more. They can have different shapes, drawings, size. Because of what they are…

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Land and relief of the planet

  • Sushi is called the part of the surface of the planet that is not covered by oceans, seas, lakes, rivers and other water objects. And its share accounts for less than one third of the Earth’s surface. More specifically, the order of 29.2%. And all this territory is divided between different natural zones.Forests occupy most of the land (about 27%), although everything may change in the near future as the felling of the forest does not stop. Another 21% of the land is allocated under pasture (grassland for cattle grazing). Almost all the remaining part of the land in about equal proportions (9-11%) is divided between the deserts, arachnids and glaciers.Glacier
    Photo by Kimberly Vardeman, link to the original (photo has been changed).
    The relief of the planetThe relief of the planet is called the totality of the roughness of its surface. It is formed as a result of various natural phenomena, the main of which is the movement of lithospheric plates (as well as the phenomena generated by it). So, in the center of tectonic plates, as a rule, is the flat terrain. But at the joints of the plates there are either mountains or cavities (depending on whether the plates converge or diverge). Mountains and plains are the predominant forms of terrain surface relief.Mountainous terrain
    The terrain of the planet plays an important role in the distribution of heat and moisture over the earth’s surface. That is why, by the way, due to changes in human relief, the climate of certain regions also sometimes changes, and natural phenomena arise. For example, sandstorms may occur due to deforestation (in some places, their number has increased by 5-10 times). And because of the construction of tall buildings in the cities becomes hotter in the warmer time of the year. Generally speaking, it is rather difficult to predict what will be caused by certain changes in planetary relief. Therefore, sometimes people act like little children: they will do, and then they will look at the result of their intervention. But otherwise, in any way, and it’s better to learn from their mistakes than to not learn at all.Mainland and islandsBoth continents and islands are parts of sushi, washed by oceans and seas. Their difference lies only in size. So, the continents are called huge sushi spaces. There are only 6 of them on this planet: Eurasia, Africa, North America, South America, Australia and Antarctica.World map
    Note that North and South America are isolated on separate continents, like Eurasia with Africa. All because the mainland is a geological concept, but from a political point of view, there are only 4 vast areas of land on our planet, and they are called continents: New World (North and South America), Old World (Eurasia and Africa), Australia and Antarctica . It is worth understanding the difference between these concepts.

    The island is a relatively small area of ​​land surrounded by water from all sides. Most of the known islands are located not far from the mainland, in the seas and oceans. Such islands are called oceanic. But they can be located on land (in rivers, for example). In this case, they are called continental (or continental).

    The island is in the form of a heart
    Photo by Bruce Tran, link to the original (photo has been changed).
    Interesting

    Almost all of the Earth’s surface has been studied to date, but there are still many gaps in the information about our planet. And one of these white spots is the caves. Perhaps this is the most mysterious part of the land. And in spite of the fact that the lovers of speleologists are becoming more and more, few people descend below the ground deeper than a couple of kilometers, but this is also very much. And in general, no one knows for sure that he is at a depth of 5-10 underground, because nobody has been there. But the space under our feet is not at all a solid stone bed. The Earth’s subsoil is dotted with many cracks and cracks, underground rivers flowing there, lakes are formed. And there may well exist living organisms that are unknown to us

White shark is a dangerous predator
White shark is a species of large predatory fish. And although they are best known for this name, there are others. So, the full name of these fish is Big…

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Role of rivers in nature
The river is a significant amount of water flow flowing along the channel (deepening in the earth's surface) from the source (the beginning of the river) to the mouth (the…

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