Refine Your Design and
Create Your Final System
What happened when you treated your sample of "contaminated" water? Were you able to see a difference between the untreated and treated water?
Record your conclusions and develop some ideas for revisions on page 14 in your Engineering Portfolio. Next, go back to your prototype and make necessary changes to refine the design.
If you have time, test your system again, comparing your new results to your original test results.
In this activity, students will refine and retest their water purification systems. Have students turn to page 14 in their Engineering Portfolios. Work with groups as they figure out how to refine and retest their designs. Be sure to have additional materials and water available for students.
- How can the engineering design process be used to solve real-life problems?
- What are some effective methods for purifying water?
Meet microbiologist Beronda Montgomery.
Microbiologists study microorganisms, which are living things that can only be seen with a microscope.