Yes, a physical model can represent how a landscape has changed over time. A physical model is a three-dimensional representation of an object or system, and can be used to visualize and understand changes over time. For example, a physical model of a landscape could be used to show how the landscape has changed due to erosion, deposition, or other geological processes. Physical models can also be used to represent changes in vegetation over time, or to show how a landscape has been shaped by human activities. Physical models provide a tangible and visual way to understand and communicate changes in a landscape over time.