'''Water''' is a [[chemical substance]] that is essential to all known forms of [[life]]. It appears [[color]]less to the naked eye in small quantities, though it is actually slightly [[blue]] in color. It covers 71% of Earth's surface. | '''Water''' is a [[chemical substance]] that is essential to all known forms of [[life]]. It appears [[color]]less to the naked eye in small quantities, though it is actually slightly [[blue]] in color. It covers 71% of Earth's surface. |