No dirt no germs
In the filtration activity students will use household materials to build a water filtration unit and identify the efficiency of different filtration materials. Then, as a follow up, they will carry out a treatment of the water. In addition, they will research the methods of their local water treatment plant and report the results of their research to the Global Experiment website.
The experimental activities will include: identification and collection of natural surface water, construction of a rudimentary filtration device, addition of alum and disinfectant to water.
Students will learn the chemical concepts of aeration, coagulation, sedimentation, disinfection and filtration.
The other part of the experiment will provide students with the local context for their work.
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