Water Cycle

 Water is a chemical substance that its the fluids of all known living organisms. Its chemical formula is H2O meaning that each of its molecules are made of two hydrogen atoms and one oxygen atom.

The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth.