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Step 7: What is a cycle?

The amount of water on the earth has been almost the same for hundreds of millions of year.
Why?

Cycle:
a complete set of events that happens again and again in the same order.

"Water falls from the clouds down to the earth, turns to steam, rises to make clouds, and then falls again. This process is called the water cycle."
- The Water Cycle By Don L. Curry

How does the cycle work?
*When the sun warms the surface of a body of water, the water evaporates and moves upward as vapor (steam).
*Clouds and mists are formed when the sun warms the surface of the waters in lakes, streams, oceans, and puddles. Then water in the form of a gas rises into the warm air and a mist or fog appears. This is called evaporation.
*If water vapor continues to rise in the warmth of the sun, tiny droplets of water begin to collect around dust paricles in the air. When these cool, a cloud is formed. Clouds are masses of water droplets and ice crystals in the atmosphere. They come in all shapes and sizes.
(Taken from Water Dance)

Now your task is to read Water Dance by Thomas Locker as a class. What do you learn about the water cycle? What are the stages of the water cycle?

Websites to visit about the water cycle:

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