Wednesday, April 22, 2009

water cycle

1.What is the water cycle?
Water is used over and over again.
The water cycle is the continuous movement of water from ocean to air and land then back to the ocean in a cyclic pattern.
The sun heats the Earth's surface water which causes it to evaporate (gas).
The water vapor rises into the Earth's atmosphere where it cools and condenses into liquid droplets.
The liquid droplets combine and grow until they become too heavy and fall to the Earth as precipitation.
Water is temporarily stored in lakes, glaciers, underground, or in living organisms. The water can move from these places by streams and rivers, returns to the ocean, is used by plants or animals or is evaporated directly back into the atmosphere.
2.Does the water cycle have a beginning or end?
A cycle doesn't have a beginning or end. If you want to say the start is water on the ground, then the last step before it goes to being water on the ground again is precipitation. If you want a real end, it is when the world runs out of water.
3.Starting with a puddle on a sunny day, describe how water might move through the water cycle and eventually fall back as rain.
It will evaporate and turn into condensation and be bought up into the atmosphere.
4.Create a diagram (using Google docs or word) of the puddle to rain scenario you created for extra credit.

No comments: