Earth - the only currently known planet where there is life. Its natural features are the subject of many scientific studies. It is the third in a row planet from the Sun and the largest of the Solar System in diameter, mass and density among the terrestrial planets. Basic klimaticheskieosobennosti Earth is the presence of two large polar regions, two relatively narrow temperate zones and one wide equatorial tropical region. [1] Precipitation planet varies widely depending on location and range from a millimeter to several meters of rainfall per year. About 71% of the Earth's surface covers the ocean. The rest of the continent is iostrovov, with most of the land populated by people is vsevernom hemisphere.
The evolution of the Earth occurred through geological and biological processes that have left traces of the original conditions. The planet's surface is divided into several continuous dvizhuschihsyalitosfernyh plates that result in periodic merger and separation of the continents. The inner part of the Earth consists of a thick layer rasplavlennoymantii and iron core, generiruyuschegomagnitnoe field.
The current composition of the atmosphere has been significantly altered from the original of life through various forms of life [2], which create ecological balance, stabilizing conditions on the surface. Despite significant differences in climate, depending otshiroty and other geographic factors, the average global climate is quite stable during periods vremyamezhlednikovyh [3], and the change of 1-2 degrees in average global temperature have historically had a major impact on the ecological balance and the geography of the Earth. Я не уверина что правильно