global article

Earth is the third planet from the eight planet in the solar system. Age is estimated to reach 4.6 billion years old. The distance between the Earth with the sun is 149.6 million kilometers or 1 AU (english: astronomical units). Earth has a layer of air (atmosphere) and magnetic fields called (magnetosfer), which protects the Earth surface from the sun, wind, ultraviolet rays and radiation from outer space. This layer of air envelop the earth to a height of approximately 700 kilometers. The air layer is divided into Troposfer, Stratosfer, Mesosphere, Termosfer, and Eksosfer.
Ozone layer, at 50 kilometers, is located in the Mesosphere and stratosfer layer and protect the earth from ultraviolet rays. The temperature difference between the surface of the earth is -70 ° C to 55 ° C depending on the local climate. In a day divided into 24 hours and one year in the same earth with 365.2425 days. Earth has a mass as 59,760 billion tons, with a surface area of 510 million square kilometers. The weight of the Earth (about 5,500 kilograms per cubic meter) is used as a comparison unit weight of another planet, with the weight of the Earth is set as 1.
Earth has a diameter of 12,756 kilometers along. Earth gravity measured as 10 kg N-1 as the unit of measure gravity another planet, the gravity of Earth is set as 1. Earth have 1 satellite is the natural Month. 70.8% of water covered the surface of the earth. Air Earth consists of 78% nitrogen, 21% oxygen and 1% water vapor, carbon dioxide and other gases.
Earth is estimated to be composed of the nucleus in the earth, consisting of iron, nickel frozen setebal 1,370 kilometers with a temperature of 4,500 ° C, also covered by the outer core of liquid setebal 2,100 kilometers, and also covered by a coat silica setebal 2,800 kilometers form 83% of the contents of the earth, and Finally once covered by the earth crust setebal less than 85 kilometers.
More thin earth crust on the bottom of the sea is about 5 kilometers. Now the earth was divided to some parts and moving through the movement of plates tektonik (Continental drift) that produce earthquakes.
The highest point on the surface of the earth is the mountain Everest at 8,848 meters, and the point is terdalam Mariana trough in the Pacific Ocean with a depth of 10,924 meters. Terdalam lake is Lake Baikal with a depth of 1,637 meters, while the largest is lakes Caspian Sea with an area 394,299 km2.
Layer of earth
According to the composition (of the type of material) is, the earth can be divided into layers, layer as follows:
• Now Earth
• mantle of Earth
• Core of Earth
Meanwhile, according to the mechanical nature (the nature of the material) is, the earth can be divided into layers, layer as follows:
• Litosfir
• Astenosfir
• Mesosfir
• outside the nucleus of Earth
• The core part of the Earth