The sun shines on water in rivers, lakes, streams, wetlands and oceans. As a result, it makes the water warmer. This turns the water into vapor or steam. The water vapor leaves the lake, ocean or river and goes into the air, where it becomes a cloud.
When the weather is colder, clouds or water vapors will bind together again and come back to the earth in the form of rain, hail, freezing rain, sleet, and snow. That's what we call precipitation. 
j0144445.jpg (2704 bytes)
Material and instructions:
Research and perform experiments to find out why the precipitation is important. Why do we measure the amount of precipitation? How do we measure precipitation? 
Also measure precipitation in your area in a given period of time. 
 The rain gauge, thermometer and hygrometer you may need with your earth science experiments are available at online store.
Details of this project:
More information or support on this project is available for the members of You may also find a Science kit for this topic at