Their task involved trying to figure out how to purify or "clean" a sample of foul water by using any provided materials (sand, gravel, dirt, oatmeal, charcoal, liquid soap, salt, etc). They were given many materials, not all of which were helpful.
They were instructed to write down the results from each substance used to purify - and whether or not it worked, observing how it looked and smelled before and after purifying.
Some students even worked with heat, which did help! Students did a great job cleaning up that nasty looking water!
|working on water clean up|
|progressively cleaner water|