Dr. helmenstine holds a ph.d. in biomedical sciences and is a science writer, educator, and consultant. she has taught science courses at the high school, college, and graduate levels. in fact, one common chemistry demonstration is to fill a (small) balloon with hydrogen and oxygen and touch the. How to make a water filter. in this article: article summary making a water filter using your water filter making other types of filters community q&a 12 references water is essential to life. this technique is very useful when you are hunting to survive. people can live up to a week without food, but only two to three days without water.. The easiest way to make water in the desert is through condensation. dig a 19-inch (50-cm) deep hole in a dried out river bed, then fill it with leaves and a mug or cup. cover the hole with plastic wrap, seal the edges with dirt, and place a stone in the center of the plastic wrap..
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