Learn More About Our Water Supply
Yet again we randomly pull one of our The Magic School Bus books to read together and the choice fell on The Magic School Bus at the Waterworks, a reprint of one of the original The Magic School Bus released more than 25 years ago. Yet again, I was impressed with the amount of information presented in this book as the kids travel from the mountain stream through the water treatment facility and finally drip out of the faucet in their own school.Smarty is very focused on “practical science” now, so she was delighted to be able to try her own water filtration project at home as an extension of this book. She, of course, wanted to have all the ingredients of water filtration described in this book including alum and chlorine, but we had to limit ourselves with what we had on hand. Needless to say, I didn’t allow her to drink any water that we collected, and in a minute you will see why.
- A filtering container. We made ours out of an empty tennis ball can. I cut off the end of it and put some tape around the opening to make sure Smarty does not cut herself in her rush. We made holes in the tennis can cap with an awl, and put it back on the can.
- Some clean glasses and a glass with dirty water. To make water dirty, we added 2 TBS of garden dirt every time we tried a different filter, so amount of dirt was our controlled variable.
- Filter material. We tried three different filters - coffee filters, thick terry cloth from an old towel, and a “natural filter”.
Making a Survival Water Filter
Which Filter Was Best?
Smarty predicted after watching a survival filter video that natural filter will work best, but that has not been our experience. Terry cloth filter won. I am actually very interested to try making the natural filter with charcoal and compare the difference. In fact, this water filtration project just “might” be the next year science fair entry.
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