Sometimes it is just fun to answer a kid question. This one came from my 8 year old. He wanted to know what the “cracks” in our skin of our palm looked like close up….We used clear tape to pull off some cells of my palm, stained them and then took a picture with the motic cameras. Fun Sat afternoon activity…
April 10, 2012 in High School STEM
The kids in ES recently created their own water filters using items present in nature. We have been studying water pollution and wanted them to have an idea of how a filter can work to make water “clean” with “dirty” stuff like sand, gravel, dirt, etc.
We weren’t sure how well it would actually work but as you can probably tell from the picture…some of the kids made some pretty clean water…..probably cleaner than you can get out of some of the water fountains around here.
The first water sample in the cuvette on the left is the polluted water we provided. Each of the following samples are from actual student filters. The last sample on the image is Distilled Water which was our control at 0% polluted. Congrat’s to Trey Cleveland for eliminating 92% of the pollution in his sample using his filter design.
Students used sand, rocks, gravel, leaves, grass, hay, etc. Each made their own design and then tested it. We provided a sample of water which we made “dirty” by adding food coloring to simulate dissolved particles. They passed the water through the filter, collected the resulting filtrate and used the colorimeter to compare to the original sample.
We had a ball and hopefully learned a lot too….
To learn more about water filters and how they are being provided to developing countries, visit the following websites about the LifeStraw and the BioSand water filter.
LifeStraw- a personal water filter- for about $10, you can give clean water to a child for a year!
BioSand Water Filter- a community filter which can produce about 20 gallons in an hour. For under 100 dollars you can help give clean water to an entire community. BioSand Water Filter -The solution
March 29, 2012 in High School STEM