Scholastic
Scholastic: Study Jams! Science: Ecosystems: Water Cycle
Watch an animated video on the water cycle, become familiar with related vocabulary terms, and then quiz yourself on the parts of the water cycle, and review your answers when you're done. Site includes guidelines for a lesson entitled...
US Geological Survey
Usgs: How Much Water Is There on (And In) the Earth?
The USGS gives an overview of the amount of water on Earth and where it is located. It gives a few interesting facts about the Earth's supply of water. Click Home to access the site in Spanish.