A cyclic model is a type of model like a circle that describes how different processes happen over and over again. It is used to explain how certain things happen in cycles or patterns. For example, it might be used to explain the way plants and animals grow and change over time, or to explain the changing of the seasons. It can be used to describe the way the Earth's climate changes over time from warm times to cool times. It can also explain how money moves through the economy or how energy is shared between different types of things. Basically, the cyclic model shows how different things repeat and how one thing can affect another.