
"Let's Find Out" Videos
With Lesson Plans and Links
Let's Find Out: How to Clean Wastewater!
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Cog is joined by 2 good buddies, and one is human. Join the trio as they take a tour of the wastewater treatment plant and find out how we clean wastewater (sewer water) by separating out the garbage, sludge, and water. The two dogs (Cog and Cosmo) can't decide if this is the best or worst field trip ever as they learn about the processes involved in cleaning wastewater, like raking, clarifying (using sedimentation), digestion, and sterilization. Lots of great science here!
Click here for FREE lesson plans for this video.
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NGSSMS-ETS1-2
Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.
NGSS3-5-ETS1-3
Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved.
NGSS3-5-ETS1-1
Define a simple design problem reflecting a need or a want that includes specified criteria for success and constraints on materials, time, or cost.