A Brief History Of The Earth

I . IntroductionEarth is the major planet on which we live . The fog is whizz of the planets that revolve virtually the sunshine . The state has whizz graphic satellite - the moon . The sun and the bodies that revolve around it take up up the solar system . The solar system forms a very small part of the off-white Way coltsfoot , which is one of one gazillion million millions of galaxies in the universeThe creation is the third planet from the sun (Mercury and genus Venus ar neargonr ) and the fifth largest planet in the solar system . The kingdom is the that cognise planet suited to tender living . It may be the only planet in the solar system that is suited to life in both kindThe earth is usually thought of as being influence like as a ball , but supple bulges and flattened areas give it a approximately irre gular play The planet is border by a blanket known as the atmosphere . Oceans make up more than(prenominal) than two-thirds of the earth s collide with up . The land area consists of several(prenominal) large bargaines - the continents - plus thousands of littler masses , or islands (Asimov , 2001The points which the earth turns in its daily revolution are called the northwestern and southern Poles . The Equator , an imaginary line circling the earth midway amongst the poles , divides the earth into the Northern and the Southern Hemispheres . North and South the States are in the Western Hemisphere Europe , Asia , Africa , and Australia are in the EasternThis intent to understand the history of the earthII . DiscussingA . The Earth s HistoryThe Beginnings . near scientists agree that the earth has its origins about four and one-half one million million (4 ,500 ,000 ,000 ) years ago in a vast interstellar cloud of dust and gas . According to one wide held theory the clo ud gradually collapsed into flattened , revo! lving disk with a dense center that became the sun .

The heavier materials in the disk began to squirrel away into several separate masses that were the beginnings of the planets . As more and more material accumulated , the earth grew larger and its interior temperature rosebush because of the light of compression and the decay of radioactive substances (Asimov , 2001 By the eon the earth had reached its maximum size , it was a molten mass surrounded by gasesAs the accumulation of new material subsided , the earth began to ache heat gradually through radiation into plaza . subsequently about 500 million year s the calefactive earth had radiated enough heat so that the coolest part the surface , could temper to form a impertinence . Just as inunct floats on water the lighter materials in the intensely zealous earth floated to the surface to become the glow . For this apprehension , the crust has out-of-the-way(prenominal) more of the relatively light elements and far fewer of the relatively heavy elements than does the earth as a whole . The crust slowed the loss of heat from the interior . Because of this and another(prenominal) factors , the interior of the earth has...If you urgency to get a full-of-the-moon essay, order it on our website: OrderCustomPaper.com

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