Ecosystems | Assessment Review
Students review key ecosystem concepts through structured recall, comparison, and application tasks. The lesson is designed for a challenging Grade 11 class and focuses on preparing students to explain and analyze ecosystem relationships, energy transfer, population dynamics, and human impacts.
| Term | Definition |
|---|---|
| ecosystem | A community of organisms interacting with each other and with the nonliving environment. |
| biotic factor | A living component of an ecosystem, such as plants, animals, fungi, and bacteria. |
| abiotic factor | A nonliving environmental factor, such as water, light, temperature, and soil. |
| trophic level | A feeding position in a food chain or food web. |
| energy pyramid | A model showing how energy decreases as it moves through trophic levels. |
| predation | An interaction in which one organism kills and eats another. |
| competition | An interaction in which organisms compete for the same limited resource. |
| symbiosis | A close relationship between different species in which at least one species benefits. |
Display 4–5 short review questions covering food webs, energy transfer, and ecosystem interactions. Circulate and note common errors.
Individually answer the questions in notebooks, then compare responses with a partner.
Lead a concise review of ecosystem structure, energy flow, trophic levels, and major species interactions. Emphasize common misconceptions and ask for quick student examples.
Respond to cold-call questions, correct notes, and add missing information.
Give pairs a set of terms or statements to sort into categories such as biotic/abiotic, producer/consumer/decomposer, and interaction types. Probe reasoning and ask for justification.
Work with a partner to sort and defend each placement using clear reasoning.
Present one or two ecosystem scenarios with data or a short case study. Ask students to identify affected trophic levels, predict outcomes, and explain how a change would ripple through the system.
Annotate the scenario, discuss in small groups, and write a brief evidence-based response.
Invite groups to share answers. Highlight strong reasoning, address inaccuracies, and connect student responses to broader ecosystem principles.
Share responses, ask clarifying questions, and revise notes based on feedback.
Provide a short set of challenging mixed questions for independent completion. Use responses to gauge readiness and identify remaining gaps.
Complete questions independently and self-check against class discussion if time allows.
End with a brief exit reflection: students write one concept they understand well, one concept still uncertain, and one strategy they will use to improve on the next review task.