The Water Cycle (also known as the hydrologic cycle) is the journey water takes as it circulates from the land to the sky and back again.
The earth has a limited amount of water. That water keeps going around and around and around and around and (well, you get the idea) in what we call the "Water Cycle".
This cycle is made up of four main parts:
evaporation (and transpiration), condensation, precipitation, collection
Water vapor is water in a gas form that is held in the air until it changes back to water. You know, sometimes it s sticky outside in the summer - that s just water held in the air. The water can change into fine droplets by "condensing" in the air, and we get clouds. When the droplets get big enough, they are pulled to the earth by gravity as precipitation, better known as rain, sleet, snow, hail, dew, or frost.