Earth

Earth

The land? Hua home - life - diversity - land water ................. etc - the land has many names inside man as it is the permanent home of man, animal and plant because it contains all the means that Beings help life as the only planet so far there are all forms of life and is the planet chosen by God Almighty Adam and Eve.

- We must protect and preserve it because it is the only planet that Yaowina. - The Earth is in the planets (solar system) and the solar system is one of hundreds of billions of stars. No life has yet been established on the surface of any of the planets that are recognized from time to time with the development of space science technology.

I will give you information about our precious planet .. at several points ..

Planet Earth:                                         The solar system consists of eight planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune). The Earth is a rocky planet with a high density and mineral composition, orbiting the illuminated sun, which is the source of light and heat. The Earth is the third planet in its distance from the Sun. This makes it at a suitable distance that keeps its temperature within a moderate range, allowing water to exist.In its liquid state on its surface, and for life to flourish. The planet is a planet enveloped by water bodies, geological topography of mountains, plateaus and plains, due to the presence of large geological activity on the ground, represented by the movement of tectonic plates and volcanoes and erosion factors of wind and water. The Earth is surrounded by the atmosphere that supplies living organisms with oxygen gas, a gas that is very important for biological operations.Carbon dioxide, which is very important in maintaining the warmth of the earth and protecting it from thermal fluctuations. The area of ​​water is 71% of the total area of ​​the earth, and is a key factor in the existence of life as well. A magnetic envelope around the globe helps protect it from the high-frequency radiation from the sun, which could pose another life threat.

2 - the composition of the earth's interior: - The earth consists of four layers of the interior. It is the inner nucleus (at its very heart). It is a huge steel ball composed of iron and nickel metal, with a diameter of about 2450 kilometers. It is followed by the outer nucleus, which is also composed of iron and nickel but takes the liquid state. Then comes the mantle, which occupies most of the planet, a very hot mixture of soluble rocks and lavaThousands of kilometers, which is causing the movements of the Earth's surface. The last layer is the earth's crust on which the topography of the Earth and all living organisms are found. It is only 30 kilometers thick on land and a few kilometers at the bottom of the ocean.

3 - Water bodies: -                                                    Sea and oceans constitute 71% of the earth's surface, these seas and oceans vary in depth; Faisal depth in some locations for about four kilometers, but all seas and open oceans unite in the water level relative to land, because of the fact that All of these seas and oceans are interconnected, so altitudes are measured on land according to the water level of these seas. Open oceans contain 96.5% of all water on EarthThe rest is distributed among inland rivers, lakes and seas. Water is also found on the ground frozen in the poles, in high mountain peaks, in glaciers, and also in gaseous atmospheric conditions. Water, whether in liquid or solid form, is one of the main erosion factors that alter the shape of the Earth's surface. It causes the digging of valleys, the reshaping of mountains, and the digging of streams and rivers across plains and forests.

4. Earth's atmosphere: -                               Earth has an atmosphere that helps to preserve its heat and provide air that is breathed by living organisms. It contains clouds and air responsible for the movement of winds that lead to many changes on the Earth's surface. Scientists divide the Earth's atmosphere into five basic layers according to its density and composition. The lowest atmosphere is the troposphere. Earth, such as rain, thunderstorms and hurricanes. It is followed by an altitude of 50 kilometersThe mesosphere, where the ozone layer is responsible for the absorption of ultraviolet rays from the sun. And then the thermosphere, which rises for 600 kilometers, and has satellites orbits. The ionosphere interferes with all the aforementioned layers, a layer of electrons and ionized atoms (electrically charged),The radar devices depend entirely on this layer, and the thickness of the ionosphere changes according to certain conditions, including the intensity of the sun's rays. Finally, the exosphere, the outer boundary of the atmosphere that begins to interfere with space, extends about 10,000 kilometers away from the Earth's surface.

5. Tectonic plates: -                                     The surface of the earth consists of a group of giant plates that move closer to each other, or move away from each other in what is known as the movement of tectonic plates, can enter a plate under the plate of another plate approaching each other, and at the same time away from other plates. These movements cause earthquakes and volcanoes. The surface of the Earth is characterized by a lot of terrain, such as mountains, valleys and plains, and is the result of many geological factors that change the shape of the planet.