The water cycle is an example of a natural cycle. It is one in where there are elements leaving and returning to any one part of the system, but the average in each box of the total remains the same.
Water is found in a number of places on Earth.
Cryosphere 2.05 Groundwater 0.68 Lakes 0.01 Soils 0.005 Atmosphere 0.001 Rivers 0.0001 Biosphere 0.00004 Water cycle . The water cycle involves the transfer of water from one reservoir to another. Water in the Ocean is heated by the Sun and evaporates. The water vapor enters the atmosphere and becomes part of the weather cycle as we have previously studied. Notice that in the water cycle budget, all of the inputs and outputs equal each other.