1 In recent years, the U.S. has seen a number of winter storms that have caused surprisâ¦. 2  The Periodic Table of Elements Life is sustained by a number of chemical elements. 3  They are responsible for the birth of planets and the evolution of cells to complex organisms.
Water distribution on Earth - Distribution of saline and fresh water. 1  The total volume of water on Earth is estimated at 1.386 billion kmÂ³ (333 million cubic miles), with 97.5% being salt water and 2.5% being fresh water. 2  The total volume of water in rivers is estimated at 2,120 kmÂ³ (510 cubic miles), or 2% of the surface fresh water on Earth.
About 1.460 petatonnes (Pt) (1021gr) of water covers 71% of the Earth's surface, mostly in oceans and other large water bodies, with 1.6% of water below ground in aquifers and 0.001% in the air as vapor, clouds (formed of solid and liquid water particles suspended in air), and precipitation.[1] Saltwater oceans hold 97% of surface water, glaciers ...