Student teams practice water quality analysis through turbidity measurement and coliform bacteria counts. They use information about water treatment processes to design prototype small-scale water treatment systems and test the influent...

During the lesson, students will also design, build and test a solar cooker that pasteurizes water.

Electric appliances large and small promised reduced drudgery. Most people take washers and refrigerators for granted today, a century ago, these machines revolutionized people's daily lives. The introduction of running water and...