It is all doubtable, testable and open to disproof. This is the strength of the scientific method; it is a heuristic. It does not lead to absolute truth. There are some basic observations that are probably undeniable for all of time, but the more speculative or theoretical a scientific principle is, the more it is vulnerable to change or re-interpretation.
You create a theory. Prove the theory to be true by testing it. If it works, it is true. If it does not work, it is not true.
TRUE !!
Which statement is true of all scientific laws
They are based on science
no!!!
no, never
True
They are based on science
It didn't work. Science is all about figuring out how things work. Alchemy doesn't work, and never did.
no
no
True