Earth
07.22 | Author: Klana

Earth is the third planet from the eight planets in the Solar System. Estimated to reach 4.6 billion year age. The distance between the Earth to the Sun is 149.6 million kilometers or 1 AU (ing: astronomical unit).



Earth has a layer of air (atmosphere) and the so-called magnetic field (magnetosphere) that protect Earth's surface from the solar wind, ultraviolet rays, and radiation from outer space. This air layer surrounds the earth to a height of about 700 kilometers. The air layer is divided into Troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

The ozone layer, as high as 50 kilometers, are in the stratosphere and mesosphere and protects the earth from ultraviolet rays. The difference between the earth's surface temperature is -70 ° C to 55 ° C depending on the local climate. A day in divided into 24 hours, and a year on earth equal to 365.2425 days. Earth has a mass weight of 59,760 billion tonnes, with a surface area of ​​510 million square kilometers. The density of the Earth (about 5,500 kilograms per cubic meter) is used as a unit of weight ratio of any other type of planet, the gravity of the Earth is set as 1.

Earth has a diameter of 12,756 kilometers long. Earth's gravity is measured as 10 N kg-1 be a unit of measure of the gravity of other planets, the Earth's gravity is set as 1. Earth has one natural satellite is the moon. 70.8% the earth's surface covered with water. Earth Air consists of 78% nitrogen, 21% oxygen, and 1% water vapor, carbon dioxide, and other gases.

Earth estimated to be made up in the Earth's core consists of iron-nickel-thick frozen 1370 kilometers with temperatures 4500 ° C, is also covered by a liquid outer core that is 2100 kilometers thick, and covered also by the 2800 kilometer-thick mantle of silica to form 83% of the earth, and eventually completely covered by the earth's crust about 85 kilometers thick.

The crust is thinner at the bottom of the sea which is about 5 kilometers. The crust is divided to several parts and moving through the movement of tectonic plates (the theory of continental drift) that produce earthquakes.

The highest point on the earth's surface is as high as Mount Everest at 8,848 meters, and the deepest point is the Mariana trench in the Pacific with a depth of 10,924 meters. Lake Baikal is the deepest lake with a depth of 1637 meters, the largest lake is the Caspian Sea with an area of ​​394,299 km2.

Source: WordPress

This entry was posted on 07.22 and is filed under . You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

0 komentar: