Initial state
Morse and MacKenzie suggested that the sea first formed on Earth in the Hadean era, about 200 million years after the formation of the earth. until the 1960s, the Experts still debate whether fresh water comes from the earth, for example from a spring, the water from the rock formation, and so forth-or from rain. In a decade, the 1970s, almost all water resources experts agree that 90% of fresh water comes from rain cycle, the hydrologic cycle.
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The first sea that formed when it is an environment very hostile. One of them is caused by its high water temperature, which among others because the celestial object by the frequent high-temperature deep into the earth.
The researchers also found that the continental shelf begins to form not too long after the Earth formed.
Many theories about when the earth is ready uninhabitable. Of the many theories, experts agree the three models which are considered to represent other theories.
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