What is true about all scientific models?
True scientific models must all lead to testable hypotheses;
otherwise, they are unverifiable and not so different than
speculation. Note that some scientific models may not be testable
at the time they are proposed if the technology of that time is not
available to conduct proper tests. Sometimes, the work that goes
into figuring out ways of testing new hypotheses leads to the
invention of new instruments or the design of new machines that can
end up having benefits greater than what they were originally
designed for.