Rain has a naturally acidic pH of about 5.6 because it contains natural derived carbon dioxide and sulfur dioxide. Water conducts heat more easily than any liquid except mercury. This fact causes large bodies of liquid water like lakes and oceans to have essentially a uniform vertical temperature profile. Water exists as a liquid over an important range of temperature from 0 - 100 degrees Celsius. This range allows water to remain as a liquid in most places on the Earth.
Liquid water is a universal solvent .
It is able to dissolve a large number of different chemical compounds. This feature also enables water to carry solvent nutrients in runoff , infiltration , groundwater flow , and living organisms. In other words, water is adhesive and elastic, and tends to aggregate in drops rather than spread out over a surface as a thin film. This phenomenon also causes water to stick to the sides of vertical structures despite gravity's downward pull. The following illustration shows how the water molecules are attracted to each other to create high surface tension.