continuation of last post
Scientists do accept the difference between accidental chemical changes (mixtures for instance) and true substantial changes (those that yield genuine chemical compounds) Hence scientists implicitly and on a common sense basis admit something very like primary matter.
In order that matter and form not be conceived in too naive a fashion, it is best to avoid thinking of them except in terms of the next question.
2 What is nature? Nature is the condition of the possibility of change( or rest) which belongs to a thing essentially. as such it is an entirely relative term: Nature can not exist without change or rest, and change cannot exist without nature. This is why I spoke about motion being intrinsic to the nature of the object moving, and its irrational consequences I already explained what change is which is the third question Aristotle asked. the definition immediately suggests a connection with matter and form, as possibilities (potentials for
change
The implications and foundation of the special sciences:
The principal implication of the view is that Aristotle’s world is dynamic through and through. There is no possibility of conceiving the world as Newton did, as a gigantic clock that God created and then set in motion. Material beings simply cannot exist without natural changes that belong to them.
A second implication is that the world is an interrelated system of bodies all acting on one another and each carrying out its assigned role in the whole-- there is no place for a vacuum or empty space between bodies; they always extend as far as the next body so that the two can act on one another in accord with the role of each. Each natural being has its place in its own system, and it will either move to that place or resist being moved from it. a modern version of this motion would yield a realist explanation of gravity, and a realist would say that the so called “force of gravity” is merely a very helpful theoretical construct to explain the quantitative effect of natural local motion.
These three conceptions – natural local motion, natural chemical change, and functional processes in biology–are for Aristotle the foundations of a realist interpretation of the special sciences of physics, chemistry, and the life sciences (taken from the "Philosophy of Science an Introduction. by Paul R. Durbin, O.P. Saint Stephen’s College, Dover, Mass.)