Final answer:
A tentative model is an educated guess or proposed explanation that explains observed facts but has not been tested. It allows scientists to make predictions and understand phenomena. It is not as rigorously tested and confirmed as a scientific theory.
Step-by-step explanation:
A tentative model is a model that explains observed facts but has not been tested. It is an educated guess or a proposed explanation that can be easily changed. This type of model allows scientists to make predictions and develop a better understanding of the phenomenon they are studying. It is important to note that a tentative model is not rigorously tested and confirmed like a scientific theory.