Share the photo of the wastewater treatment facility and ask students, “How can we drink this safely?”

Essential Questions:

1. How is our wastewater cleaned?
2. How do we prove that different liquids and solids have different densities?

Handouts

• Wastewater Treatment Phenomena Photo
• Storyboard

Classroom Supplies (for 45 students)

• Baby carrots
• Iodized salt
• 45 Jars with lids
• Water
• Spoons

Important Links

• Lesson Plan
• Video: Teacher-Author Lesson Walkthrough
• Video: How the infrastructure bill delivers on clean water — and how it falls short
• Clean Water for All Coalition
• US Water Alliance