Scientists know where everything; you, me, this computer, all of it, they know where it came from. Everything is formed from the two parent elements, Hydrogen and Helium. These two elements form all other elements. And to form any other elements, they need extreme energy. The only place to get this amount is from a star. So to answer your question. All water came from stars.
97.5% of Earth's water is found in the oceans. 2.5% is found in freshwater lakes.
About 80% of water
70% or 80% of water covers the earths surface
Evaporation
Over 95% of the Earth's water is in the oceans and seas.
oceans
97%
Oceans make up over 71% of the Earths Surface.
Water cycle is the term for the constant movement of the earth's water from oceans to air to land and back to oceans
Roughly 75% of Earths Surface is covered by water. (including the Oceans, lakes and land Ice).
Water
Because the water water can sometimes be, or cold.