Let's hope that your soap is doing what it's supposed to! The second of six installments in the Cells unit has scholars perform an experiment cultivating bacteria in Petri dishes. They test soaps and detergents to see which is most effective at killing bacteria.

Concepts

cells, bacteria, soap, technology resources

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Instructional Ideas

• Have groups bring in different soaps and detergents so there is a variety to choose from

Classroom Considerations

• Some materials are necessary for the experiment
• Activity requires two days, with 48 hours in between
• Builds on knowledge from the associated lesson

Pros

• Lists some troubleshooting tips for the experiment
• Provides pre- and post-activity assessment suggestions

Cons

• None

Common Core

6.RP.A.3.a 6.RP.A.3.c 6.NS.B.2 6.NS.B.3 6.SP.B.5.a 6.SP.B.5.b