a model is different than a theory a model is an actually picture or structure of something a theory is what people might think about something

It means that the theory could be right and the model shows you dimenstionaly.

Scientific theory is not a model but the model can be construct to represent how any scientific theory work. Model of a large system e.g. earth's climate would contain many scientific theory of different field to make it work.

A scientific model can change if new evidence is found. If the new evidence that has been found contradicts the model or theory then a scientific model or theory can change.

What does it mean that a theory or model is workable