CK-12 Foundation
Ck 12: Earth Science: Seawater Chemistry
[Free Registration/Login may be required to access all resource tools.] Describes dissolved ions in seawater and their source.
US Geological Survey
Usgs: Water Q & A
You will find this list of questions interesting and amusing. "Things like, "Is salt water used for anything in the U.S.?," and How can we have a 100-year flood two years in a row?", are found on this this. Click Home to access the site...
CK-12 Foundation
Ck 12: Physical Science: Properties of Solutions
[Free Registration/Login may be required to access all resource tools.] How solutes affect solvents, the freezing point depression and boiling point elevation.
Hunkins Experiments
Hunkin's Experiments: How to Make Oxygen From a Battery
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This one...