This U.S. Geological Survey website explains a variety of uses for saline water. Pie graphs and bar graphs are used to illustrate the various uses. Click Home to access the site in Spanish.

This U.S. Geological Survey website explains the desalinization method used by some communities to change sea water into drinking water. Click Home to access the site in Spanish.

Find out about the Hydrologic or Water Cycle - precipitation, rain, sleet, hail, snow, and clouds are explained with accompanying illustrations.

This instructional activity uses hands-on activities and trade books along with websites to explain the formation of clouds. This instructional activity may be used in conjunction with a weather unit.

This site from NASA explains the meaning behind the different colors of the oceans. Gives information as to the role of phytoplankton in the color of the oceans and affects of the carbon cycle on the oceans.

A glossary of terms that describe the processes that occur in hydrology. Glossary explains evaporation, precipitation, soil moisture, groundwater, and stream flow.

The simulation shows the relationship between the inputs and outputs in the chloroplasts of plant, that can help explain how they convert water and carbon dioxide to glucose and water with the help of energy absorbed from light.