<P> In the classical physics observed in everyday life , matter is any substance that has mass and takes up space by having volume . This includes atoms and anything made up of these , but not other energy phenomena or waves such as light or sound . More generally , however , in modern physics , matter is not a fundamental concept because a universal definition of it is elusive ; for example , the elementary constituents of atoms may be point particles , each having no volume individually . </P>
<P> In the classical physics observed in everyday life , matter is any substance that has mass and takes up space by having volume . This includes atoms and anything made up of these , but not other energy phenomena or waves such as light or sound . More generally , however , in modern physics , matter is not a fundamental concept because a universal definition of it is elusive ; for example , the elementary constituents of atoms may be point particles , each having no volume individually . </P>
an object that has mass and occupies space is known as
an object that has mass and occupies space is known as
matter
matter