We all exist in the hydrosphere, all downstream from one another.
The question of the origin of the Atlantic basin, like that of the other great divisions of the hydrosphere, is still unsettled.
As the heat of the interior increased, these gases transpired to the surface and formed the primitive atmosphere and hydrosphere.
All of the Earth's water, including surface water (water in oceans, lakes, and rivers), groundwater (water in soil and beneath the Earth's surface), snowcover, ice, and water in the atmosphere, including water vapor. Compare asthenosphere, atmosphere, lithosphere.