water

the clasic definition of water is as follows:

water is a colorless and tasteless liquid.

this refers to pure water.

water is a mixture of various subtances. 

the predominant substances in these mixtures is pure water but other substances are suspended in the solution, usually mineral salts. the great variety of salts that can be suspended in water means that there are different types of of water has more salt content than river water. top water also has salts and other substances which are aded to make it save for drinking.

The Water Molecule

water is made up of molecules consisting of atoms from two elements hydrogen and oxygen. each molecule is made up of one atom of oxygen and two atoms of hydrogen .

notice the since water is in aq liquid state the molecules are sacattered about and can move relatively freely amongst themselves