Origin Of The Earth

Origin

Like the other planets , the Earth is made up of molecules . These molecules were floating around in space , in a cloud of dust left over by the formation of our Sun . At first , just a few molecules clumped together .Then , the clumps began to crash into each other and stick together to make bigger clumps . Later , there were big crashes as pieces of metal and rock hundreds of miles across smashed into each other . There were huge clusters , one such cluster that formed about 150 million kilometers (93,205,678.8 miles ) from the Sun was planet Earth . The planet formation was largely completed in 10 - 20 million years .

Orbit

The Sun's gravity caught the Earth , as well as the other planets , and pulled them into an orbit around it . On one hand , the Earth's momentum was always trying to carry it away from the Sun in a straight line . On the other hand , the Sun's gravity kept pulling the Earth toward the Sun .

As a result ,through centrifugal force , the Earth ended up going more or less in a circle , about 148,059,648 kilometers (92 million miles ) away from the Sun .

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History Of The Earth

Biological time line of the Earth Astronomical and geological evidence indicates that the earth was formed about 4.54 billion years ago . About 14 billion years ago ,there was a massive explosion called ''The Big Bang'', which released radiation ,particles and clouds of atoms . This Bag Bang is believed to have given birth to the Universe . Gravity condensed the atoms into galaxies where stars appeared These Stars then began creating new types of atoms as they aged and exploded as supernovae . The Sun was formed around 4.5 billion years ago followed by the Earth around the same time. Did you Know ? There is a lot of water in the Earth's atmosphere . In fact, there is enough water to cover the entire surface of the Earth with one inch of water ! Our planet is located in the perfect place for our need for water . If it was any closer or farther away from the Sun , all that water would either boil away or freeze...

Geography ;The Early Earth

The Early Earth The early Earth was like a blurred patch of scalding rock and chocking fumes . But the space , in which it was floating , was cold so the surface of the EARTH also began to cold , So the surface of the Earth also began to cool down . Approximately 3,000 million years ago , the Earth was cool enough for land masses to form . Even so , our planet remained an alien world for the next several hundred million years . Rafts of solid rock drifted in the magma like dark ice floes . Atmosphere ,Weather and Oceans -) Gases , carbon dioxide , nitrogen , gusted out from the cooling rock and enveloped the planet in a blistering atmosphere devoid of oxygen . As the Earth cooled, the steam began to condense into water , and the water ran down wherever the rocks were lower , which perhaps made the first oceans . These first oceans may have been short-lived . Space rubble left over from the birth of the planets bombarded Earth continuously . ...

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