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The “earth” and “world” known as Earth,It is the 3rd planet from the Sun and the densest planet in the solar system. Solar System ‘s four terrestrial planets, it is the largest . This is sometimes called “Blue Planet , “Blue Marble ” , clay or “sung” as it is called .

Lithosphere of the Earth many millions of years to migrate across the surface over a period of several rigid segments, or tectonic plates, is divided into. More than 70% percent of the earth’s surface that contribute to the hydrosphere with many lakes and other sources of water, with the remainder consisting of continents and islands, is covered with water. Earth’s poles are mostly Antarctic ice sheet and polar pack ice that sea ice is the solid ice that are covered with snow. The interior of a solid iron inner core of the planet, a liquid outer core that generates the magnetic field, and a thick layer of relatively solid mantle remains active with.

Earth’s atmosphere, argon , carbon dioxide and water with traces of 77% nitrogen, 21% oxygen, that is. The first was established in the earth’s atmosphere was probably a huge amount of carbon dioxide, but since almost all carbonate rocks are dissolved in the sea and used by living plants were less Got. Plate tectonics and biological processes back to these various “sinks ” of carbon dioxide from the environment to maintain a constant flow. Residents of carbon dioxide in the atmosphere at any time of the small amount through the greenhouse effect, Earth’s surface temperature is very important to take care of. Otherwise the greenhouse effect is that we know that it would be impossible without the oceans would freeze and life will be about 35 degrees C average surface temperature increases.