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EARTH

Earth
Hunted Facts on earth
  • In Roman Mythology, the goddess of the Earth was
  • Earth is the only planet on which water can exist in liquid form on the surface (though there may be liquid ethane or methane on Titan's surface and liquid water beneath the surface of Europa).
  • The Earth's atmosphere is 77% nitrogen, 21% oxygen, with traces of argon, carbon dioxide and water.
  • In common with the entire solar system, the earth is moving through space at the rate of approximately 20.1 km/sec or 72,360 km/hr (approximately 12.5 mi/sec or 45,000 mph) toward the constellation of Hercules.
  • The earth consists of five parts: the first, the atmosphere, is gaseous; the second, the hydrosphere, is liquid; the third, fourth, and fifth, the lithosphere, mantle, and core, are largely solid.
  • Clearly the magnetism of the earth is the result of a dynamic rather than a passive condition, which would be the case if the iron core of the earth were solid and passively magnetized.
  • Earth is the 3rd planet from the Sun at a distance of about 150 million kilometers (93.2 million miles).
  • The Earth and Moon were imaged by Mariner 10 from 2.6 million kilometers while completing the first ever Earth-Moon encounter by a spacecraft capable of returning high resolution digital color image data.
  • To the left of the mountains is the vast Ross Ice Shelf and the shelf's sharp border with the dark waters of the Ross Sea.
  • On the other hand, the activities of Earth's dominant lifeform (Homo sapiens sapiens) have been increasing the level of carbon dioxide in Earth's atmosphere which appears to be promoting a rising trend in global temperatures, melting ice deposits, and rising sea levels (more from the IPCC).
  • By mass, the Earth is composed of mostly iron (35 percent), oxygen (30 percent), silicon (15 percent), and magnesium (13 percent).
  • Earth has a modest magnetic field produced by electric currents generated in its metallic core by its rapid spin, which is distorted into a tear-drop shape by the solar wind.
  • The Earth is 4.5 to 4.6 billion years old, but the oldest known rocks are about 4 billion years old and rocks older than 3 billion years are rare.
  • Earth is the only planet on which water can exist in liquid form on the surface (though there may be liquid ethane or methane on Titan's surface and liquid water beneath the surface of Europa).
  • There was probably a very much larger amount of carbon dioxide in the Earth's atmosphere when the Earth was first formed, but it has since been almost all incorporated into carbonate rocks and to a lesser extent dissolved into the oceans and consumed by living plants.







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