eSchool Today
E School Today: Your Revision Notes on the Water Cycle
Learn about the different stages of the Earth's water cycle, and about processes involving water, including runoff, infiltration, and the differences between hard and soft water.
Other
Culligan: Fundamentals of Water Softening
A brief article about the fundamentals of water softening by ion exchange. Culligan water company walks you through the water softening process. Defines hard water and describes how it is eliminated through specific chemical processes.
Science is Fun
Science Is Fun: Soft Water and Suds
For this experiment, students create hard water from distilled water, then test how soft and hard water behave when detergent is added, i.e., how well suds can develop. An explanation of how dissolved minerals affect water's sudsing...