This is our water purifier experiment. The goal of this challenge is to find the quickest to purify dirty water. Imagine that you are on an deserted island, and you need to find a way to purify the water. You are only allowed to use the materials that you find on an island.

Before we began, Hyeyoung and I used string (tree vines), cloth, a pocket knife, one and a half water bottles, glue (tree sap), gravel, dirt, and sand to create our purifier. First, we cut out the water bottle with the pocket knife, flipped the top part of the water bottle upside down, draped the bottom with cloth, and forced it onto the little cup. Then, we filled the opening section with rocks, dirt, gravel, and sand. When we tried to test it out, the water won’t completely purify, so we added another section onto the previous opening section, draped the bottom with cloth, and filled it with the same materials. When we tested it out again, it purified completely.

The process of purifying starts when impure water goes into the top section. The top section filters the water. Then, the water gets filtered again by the bottom section, just in case the top section didn’t purified it enough. Finally, the pure drinking water drips into the cup.