THE WATER PLANET
what is water?
water is a colpourness, odourless and tasteless liquid.
this definition refers to pure water. it is in fact extremely
difficult to find pure water in our surroundings. an example
what we usually means by water es the in the rivers and
seas orv tap water and this water is a mixture of various substances.
the predominant substancee in these mixtures is purewater but pthers substances
are suspended in solutions, usually mineral salts. the great variety of
salts that can be suspended in water means that there are different
types of water. sea water has more salt content than river water
tap water alse has salts and other substances which are added to makes
it safe for drinking.
