Clean dirty water!
a. Color (As transparent as possible)
b. Particles (Nothing floating, please!)
c. Cost (Lower cost = more affordable)
d. Time (Quick! We need clean water now!)
-Materials (Sand, gravel, paper filter, cotton balls, cheese cloth, metal screen)
With their team's plans approved, fifth graders are creating and testing their water filter designs according to the criteria set for the challenge. With limited materials, they must begin to make challenging decisions that real engineers face on a daily basis.
Should we spend more money in order to get cleaner water? Or should we trade off the quality of the water to improve its time? As fifth graders decide to make changes to their designs, they must argue like real engineers do as they solve problems, too. Check out the photos below to see the fifth graders in action!