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    Question ID:   10902         Current Version: 1
Question: How were oceans formed?
Category: Science > Earth Sciences
Keywords: form, ocean
Type: why
Rating:(0 ratings)    Views: 309    Discussions: 0   In Watch Lists: 1  

 
    Answer:

The ocean formed billions of years ago.

Most scientists agree that the atmosphere and the oceans accumulated gradually over millions and millions of years with the continual ‘degassing' of the Earth's interior.

According to this theory, the ocean formed from the escape of water vapor and other gases from the molten rocks of the Earth to the atmosphere surrounding the cooling planet.

After the Earth's surface had cooled to a temperature below the boiling point (100 degrees Celsius/212 degrees Fahrenheit) of water, rain began to fall-and continued to fall for centuries starting about 3.8 billion years ago. As the water drained into the great hollows in the Earth's surface, the primeval ocean came into existence. The forces of gravity prevented the water from leaving the planet.

Source: NOAA

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