Ecosystems | Project Based Learning
In this 15-minute project-based lesson, students work in small groups to design a simple ecosystem model and explain how living and nonliving factors interact to support balance and survival.
| Term | Definition |
|---|---|
| Ecosystem | A community of living organisms interacting with each other and with their physical environment. |
| Biotic | Living parts of an ecosystem, such as plants, animals, and microbes. |
| Abiotic | Nonliving parts of an ecosystem, such as water, light, soil, and temperature. |
| Producer | An organism, usually a plant or algae, that makes its own food using energy from the sun. |
| Consumer | An organism that gets energy by eating plants or other organisms. |
| Decomposer | An organism, such as fungi or bacteria, that breaks down dead matter and recycles nutrients. |
Show or describe a familiar ecosystem (pond, forest, desert) and ask: What living and nonliving things must be present for it to function?
Think briefly, then share one idea with a partner.
Review biotic vs. abiotic factors and the roles of producers, consumers, and decomposers. Explain the task: design a simple ecosystem that could survive and show how the parts connect.
Listen, take quick notes, and ask clarifying questions.
Assign groups of 2-3. Provide the prompt: Create an ecosystem with at least 3 biotic and 2 abiotic factors. Include one producer, one consumer, and one decomposer. Ask groups to label arrows showing relationships or energy flow.
Collaborate to sketch the ecosystem, label components, and write 2-3 sentences explaining how the ecosystem works.
Invite 1-2 groups to present their ecosystem and reasoning. Prompt the class to notice strengths and missing components.
Present briefly and listen to peers.
Summarize that ecosystems depend on interactions among organisms and environmental conditions. Reinforce the key idea that changing one part can affect the whole system.
Complete a final one-sentence exit reflection orally or on paper.
Ecosystems are built from interactions between living and nonliving parts. A change in one component can affect the entire system.
Choose a real ecosystem and write a short paragraph describing its biotic and abiotic factors, including one example of a producer, consumer, and decomposer.