- published: 06 May 2016
- views: 15169
Matter is anything that occupies space and has rest mass (or invariant mass). It is a general term for the substance of which all physical objects consist. Typically, matter includes atoms and other particles which have mass. Mass is said by some to be the amount of matter in an object and volume is the amount of space occupied by an object, but this definition confuses mass and matter, which are not the same. Different fields use the term in different and sometimes incompatible ways; there is no single agreed scientific meaning of the word "matter," even though the term "mass" is better-defined.
Contrary to the previous view that equates mass and matter, a major difficulty in defining matter consists in deciding what forms of energy (all of which have mass) are not matter. In general, massless particles such as photons and gluons are not considered forms of matter, even though when these particles are trapped in systems at rest, they contribute energy and mass to them. For example, almost 99% of the mass of ordinary atomic matter consists of mass associated with the energy contributed by the gluons and the kinetic energy of the quarks which make up nucleons. In this view, most of the mass of ordinary "matter" consists of mass which is not contributed by matter particles.
And so life continues
As matter does not disappear
And you are not the issue
In this the universal sphere
So turn off the light
Let night embrace and take you in
Sleep within it's wisdom and
Chorus:
Dreams are not lost they merely fall beneath the ashes
Of what is left to the soul from where it starts to where it catches
And this is our time until it passes
You must remember me
A plea from one who must be kept
Like some vacant thought
We fear to find we can't forget
And you have become
In the instant you believe you have
Our memories our aftermath