how is fresh water on earth ,if salt water is 75% of our planet?

Answer 1

All evaporated water is fresh. Evaporated water rises into the air and turns into rain or snow.

Answer 2

Salt water becomes less salty when it freezes. The salt is at least partially removed through crystallization of the water. Sea ice is significantly less salty than the water that it floats on. When it melts, the less salty water tends to stay on the surface because it is less dense, so there tends to be a low salt region around melting sea ice.

Other than that, when water evaporates from the surface of the ocean the salt is left behind, so that when the water re-condenses and falls as rain, it is fresh.

Of course, when the fresh water from a river runs into the ocean it mixes with the seawater and becomes salty. How long this takes depends on the river. I've heard that the water near the mouth of the Amazon is fresh enough to drink at the surface for 50 miles from the shore.

Answer 3

Water gets on land through rain. Rain comes from water that is evaporated from the ocean or from land sources of water such as lakes, rivers, puddles, and car washes. When the water evaporates from salt water, it leaves the salt behind. When it condenses and forms rain, it's fresh.

This is like distillation, except it happens naturally.

Answer 4

Ocean/salt water actually comprises about 97% of the earth's waters. The remaining 3% percent is comprised of freshwater and is divided further into:

>glaciers/ice caps - 2.14%
>groundwater - 0.61%
>surface water(rivers, etc) - 0.009%
>soil moisture - 0.005%
>atmoshpere - 0.001%

freshwater mainly originates from precipitation (rain, snow, etc)

Answer 5

evaporation works the same as boiling. and boiling releases the water into steam leaving the minerals. same principle.