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This Biomass: Biogas Generator lesson plan also includes:
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It's a gas. Middle schoolers build a biogas generator following the directions in this resource. After a few days of observation, they demonstrate that the gas given off by the decomposing manure is flammable. The activity concludes as class members consider the implications for energy production.
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NGSS:
Adaptable
Concepts
Additional Tags
Instructional Ideas
- Measure the mass of the bottle with the manure before and after the gas is created to determine any loss
- Develop the chemical equation that explains what is happening
- Preview the scene from Mad Max Beyond Thunderdome of the methane-generating pit to determine if appropriate for your class
Classroom Considerations
- Some class members may object to handling the manure
- Store the biogas generator under a vent hood
- Make one generator for the class as a demonstration
Pros
- A simple experiment that does not require a lot of expensive lab equipment
- The resource contains background information about the natural formation of methane
Cons
- The generator takes some time to produce enough methane to show it is flammable
- Safety measures are not outlined in the resource