Enduring Understandings: Models can be used to represent systems and
their interactions.; Within a natural or designed system, the transfer of energy drives the motion and/or cycling of matter.; Rocks and fossils tell the history of Earth and how environmental conditions have changed over time.; The principle of uniformitarianism states that the processes that occurred in the past are the
same as the processes occurring presently and will continue to occur in the future.; The rock cycle is a