How the Earth Works

The Earth 's atmosphere is mainly composed of nitrogen. Oxygen occupies only 21% of the air we breathe. Carbon dioxide, argon, ozone, water vapor and other gases are only 1%. As the Earth evolves and grows, these gasses may come from several processes.

But there are scientists who believe that without the plant, the Earth's atmosphere does not contain the necessary oxygen. Plants (and some bacteria) release oxygen during photosynthesis. That is the process they use to convert water and carbon dioxide to sugar. And it can be used for food.

Photosynthesis is a complex reaction. In many ways, it is like how your body breaks down food into fuel that can be stored. Basically, with energy from the sun, plants can convert carbon dioxide and water to glucose and oxygen. Chemically:

In other words, when inhaling oxygen and spit out carbon dioxide, the plant inhales carbon dioxide and spits out oxygen. Some scientists believe that our atmosphere contains little oxygen until the plant evolves and is released.

Without the sun that nourishes plants (and the plants which release oxygen), we may not have breathable air. There are no plants to feed us, most people use them as food, and we have nothing to eat.

Clearly plants are important, but it is not just the reason that they provide us with food and oxygen for breathing. Plants help control the amount of atmospheric carbon dioxide (greenhouse gases). They protect the soil from wind and water spills and help to suppress erosion. In addition, they release water into the air during photosynthesis. This water, along with other water on the earth, is related to the huge cycle of solar control. I will look at this loop on the next page.

Carbon is the foundation of life and all organic life forms contain it. On the earth, carbon circulates the atmosphere and the planet itself. There are two elements in this loop. Geological elements include carbonaceous compounds that erode from land, enter the sea, enter the Earth's mantle layer, and are discharged by volcanoes. Biological components include inspiration and expiration of animals and plants. Since carbon is a greenhouse gas, its existence may affect the warmth and coolness of the earth. NASA Earth Observatory provides a thorough explanation of the carbon cycle

The theory of plate tectonics has contributed to the geology of evolution theory to Charles Darwin's biology. It provides a comprehensive theory of geology that explains how the earth functions. This theory was developed in the 1960s and 1970s with new information on the nature of the ocean floor, the paleomagnetism of the earth, the distribution of volcanoes and earthquakes, the heat flow inside the earth, the global distribution of fossils of plants and animals It was. . This theory shows that the outermost layer of the earth lithosphere is divided into seven large rigid blocks called plates. Africa, North America, South America, Europe, Australia, Antarctica, and the Pacific Plate. There are also several subcommittees including Arab, Nazca, Philippines sectors.

Plate tectonics is a scientific theory that explains the crustal deformation. It is widely accepted by scientists today. Recall that the continents and the ocean floor are part of the crust and the crust is divided into individual blocks called structure plates (Figure 7.14). The motion of these tectonic plates is most likely to be caused by convection in the mantle lava below the crust. Earthquakes and volcanoes are the result of short lives of this structural movement. The long-term consequences of plate tectonics are millions of years of movement across the continent (Figure 7.18). Fossils of the same type are present on a widely separated continent, proving that the continent is beyond the geological history.