Mississippi Science BIO.5.2
The Standard
- BIO.5
- Students will Investigate and evaluate the interdependence of living organisms and their environment.
Analyze models of the cycling of matter (e.g., carbon, nitrogen, phosphorus, and water) between abiotic and biotic factors in an ecosystem and evaluate the ability of these cycles to maintain the health and sustainability of the ecosystem.
2026 Mississippi College- and Career-Readiness Standards for Science · Interdependence of Organisms and Their Environments
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students trace carbon, nitrogen, phosphorus, and water through living things and the air, soil, and water around them. They use models to predict how a change, such as fertilizer runoff, affects an ecosystem.
What Mastery Looks Like
- A student can label arrows on a cycle model with processes such as plant uptake, feeding, and decomposition. They can explain how recycling keeps materials available and why too much phosphorus can lead to algal blooms and fewer fish.
Common Misconceptions
- Students may think matter disappears when organisms die or that plants get all their matter from soil. Some think energy cycles like matter does, or that adding nutrients always helps an ecosystem.
How to Assess It
- On an exit ticket, ask students to draw phosphorus moving from rock to pond water, algae, fish, and decomposers. Have them predict how fertilizer runoff could affect the fish.
Lesson moves
Ways to Teach It
Move carbon and nitrogen tokens among labeled air, soil, water, plant, animal, and microbe cups using photosynthesis, uptake, feeding, and decomposition cards.
Ask: If a pond gets extra fertilizer, which arrows on your phosphorus model grow, and why might fish die after an algal bloom?
Give pairs a diagram with missing arrows; have them add weathering, plant uptake, feeding, and decomposition, then swap diagrams to check routes.
Use a schoolyard drain map to trace rainwater carrying lawn fertilizer into a creek and mark where phosphorus enters living things.
Keep exploring
Related Standards
- ENV.1.5
Develop and use models to diagram the flow of nitrogen, carbon, and phosphorus through the environment.
- L.7.3.1
Analyze diagrams to provide evidence of the importance of the cycling of water, oxygen, carbon, and nitrogen through ecosystems to organisms.
- ENV.3.1
Use a model to describe cycling of carbon through the ocean, atmosphere, soil, and biosphere and how increases in carbon dioxide concentrations have resulted in...
- FB.6.2
Use models to analyze the cycling of matter in an ecosystem (e.g., water, carbon dioxide/oxygen, nitrogen).
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