Gases that surround a planet, like the air that surrounds Earth.
Did you know that all the water on Earth is all that we have? It's constantly moving around in a natural cycle. Some water is easy to see in our rivers and oceans, but some water is underground or in the atmosphere.
The natural water cycle is the continuous movement of water around the world through the processes of evaporation, transpiration, condensation, precipitation, run-off, infiltration and percolation.
The natural water cycle uses physical processes to continually move water from the surface of the Earth to the atmosphere and back again. This cycle is also called the hydrological cycle.
We modify and manage part of the natural water cycle to provide humans with water. This is called the urban water cycle.
Have you ever wondered how water evaporates? Where clouds come from or where water goes after it rains? It’s all part of the water cycle.
Try these science experiments and see for yourself.
How natural and human processes influence the distribution and availability of water as a resource.
How physical processes influence the flow and availability of water as a resource.
Learn how we can use evaporation to separate water.
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