Water is a compound of oxygen and hydrogen (chemical formula: H2O) with highly distinctive physical and chemical properties: it is able to dissolve many other substances; its solid form (ice) is less dense than the liquid form; its boiling point, viscosity, and surface tension are unusually high for its molecular weight, and it is partially dissociated into hydrogen and hydroxyl ions.
Water is a colourless, transparent, odourless, liquid which forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms. It is ironic that our planet is called "Earth" as on its surface, water makes up 71% of the surface area... Without water life on earth as we know it could not exist.
This post is part of the Wordless Wednesday meme,
and also part of the ABC Wednesday meme,
and also part of the Nature Notes meme.