US Geological Survey
Usgs: Water Science for Schools Activities Center
This website offers three activity centers: Questionnaires, Opinion Surveys, and Challenge Questions. Take a look at these interesting water research activities from the US Geological Survey. Click Home to access the site in Spanish.
Oklahoma Mesonet
Oklahoma Climatological Survey: Precipitation
This site briefly explores the important role of precipitation in the hydrologic cycle, and focus on how precipitation is created.
American Geosciences Institute
American Geosciences Institute: How Is Rain Formed?
Find out what happens inside a cloud when raindrops are formed.