Water cycle
The water cycle, also known as the hydrologic cycle or the H2O cycle, describes the continuous movement of water on, above and below the surface of the Earth. The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, runoff, and subsurface flow.
Water Cycle is evident in this environment because we can see water going up and down in the terrarium. Which is precipitation, condensation and many more steps in the water cycle we can see in this little environment.