There are two theories, which are sometimes combined into one. One main theory is that the water was degassed from Earth's mantle while the other theory states that our water came from the impacts of comets long ago
it is water cycle
70% or 80% of water covers the earths surface
3/4 of the earth's surface is water.
69%
about 30%
the sun
Water.
Ground water.
the water cycle
71.13% of the earth is covered by water. Only 3% of that water is fresh water, the rest is salt water.
Roughly 71% of Earth is covered by water and because that is well over half there is more water than land on Earths surface
A mountain is a natural, large elevation in the Earths surface. A basin is a depression in the Earths surface containing water.