Dead fish in tank mystery -Nitrogen cycle (Casey Hayes)
Author
Casey Hayes
Principle(s) Illustrated
Modeling Ecosystems
Nitrogen cycle
Good and bad bacteria
Hypothesis testing
photosynthesis
Standards
2.
HS-LS1-4.
HS-LS1-6.
HS-LS2-3.
Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms
Use a model to illustrate the role of cellular division (mitosis) and differentiation in producing and maintaining complex organisms
Construct and revise an explanation based on evidence for how carbon, hydrogen, and oxygen from sugar molecules may combine with other elements to form amino acids and/or other large carbon-based molecules.
Construct and revise an explanation based on evidence for the cycling of matter and flow of energy in aerobic and anaerobic conditions. [
Questioning Script
Prior knowledge & experience:
They see a dead fish but no exact evidence that it came from anything
They know that nutrients cycle through the biosphere
Students know the levels of organization in the ecosystem where the bacteria are decomposers.
Root question:
Students will think that
Target response:
Students will see that the waste from plants and animas contribute to pollution in the tank specifically nitrogen build up.
They will check to see how certain enzymes and concentration of certain molecules can account for a tremendous change in the survivability of organisms.
Students can see that the environment is not self contained and require a level of effort from outside sources.
Common Misconceptions:
The fish were infected beforehand
Magic/ invisible predators or parasite
Photographs and Movies
Applications to everyday live
Discrepant event that truly hangs your fish in the balance you diligence and active monitoring of wildlife. The tropical fish are often found outside of their natural environment, but technology has allowed us to keep them in aquariums.
References
API instruction Manuel
Aquarium city fish