Through out the past 3 days of science we have been designing a water filter. The problem was that we were stranded on an island and the only water source was to dirty to drink.  Me and Behr made 3 different designs. The first 2 were unsuccessful but the final design somewhat filtered it. In our final design we needed to use: cotton, 2 cups, pebbles, and a screen. Here are some pictures: 

I think our main problem was that with the first attempt there was so much stuff inside the straw that the water couldn’t get through. We chose this design because we had used the information from our past attempts to create the final design. We also used tips from other groups to improve our designs. I think engineering is important because it helps us solve important every day problems.