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Many common household cleaners are antimicrobials. In this activity, learners will test the effectiveness of several of these agents such as bleach, hand soap, and hand gel on a common strain of bacteria, Bacillus megaterium. Learners engage in the scientific process by making predictions, testing their predictions with positive and negative controls, and finally interpreting the results. [Activity is publicly available through a web crawler capture on Archive.org.]
- 10 to 30 minutes
- 10 to 30 minutes
- $1 - $5 per group of students
- Ages 8 - adult
- Activity, Experiment/Lab Activity
- English
Quick Guide
Materials List (per group of students)
- Tubes
- Tube holder
- Plain LB broth
- Bacillus megaterium in liquid culture (LB broth)
- Indicator solution (FDA)
- Household cleansers, soap, hand gel, bleach
- UV light and viewing chamber
Subjects
-
Life Sciences
-
Diversity of Life
- Viruses and Bacteria
-
Human Body
- Health and Nutrition
- Medicine
-
Diversity of Life
-
The Nature of Science
-
The Scientific Process
- Conducting Investigations
- Gathering Data
-
The Scientific Process
Audience
To use this activity, learners need to:
- see
- see color
- read
- touch
Learning styles supported:
- Uses STEM to solve real-world problems
- Involves hands-on or lab activities
Other
Access Rights:
- Limited free access
By:
- Fleming, Susan ; Kitty Andersen Youth Science Center, Cell Lab; Kitty Andersen Youth Science Center, Science Museum of Minnesota
Rights:
- All rights reserved, Science Museum of Minnesota, 2010
Funding Source:
- National Science Foundation