Teachers, save “TCI Unit 2 - Protecting Earth's Surface…” to assign it to your class.

1. Take a of your water filter. 2. Using or , label each of the materials you used for your water filter. 3. Answer the following questions using , , or : -Why your group chose the materials you did. Fully explain your reasoning. -Did your filter work? -What is at least one thing you would have changed about your water filter? 5. Click to submit.