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Yuck, does my deodorant kill that? To test whether deodorant is anti-bacterial, class members use petri dishes to grow control bacteria and bacteria from sweat, and then compare them to see if deodorant effects the growth.
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Concepts
Instructional Ideas
- Use several types of deodorant to find which works best at controlling bacteria
- Compare deodorant to anti-bacterial lotion or soap
- Use a structured protocol so pupils can make accurate comparisons
Classroom Considerations
- Requires scientific materials such as agar and bacterial samples
Pros
- Includes reasons if the bacteria did not grow as anticipated
- Provides a list of materials needed
Cons
- Requires overnight storage to allow bacteria to grow