Ecosystems | Whole Class
Students learn what an ecosystem is, how living and nonliving things interact, and how healthy ecosystems support human health. The lesson uses whole-class discussion, a quick sorting activity, and a short exit reflection.
| Term | Definition |
|---|---|
| ecosystem | A community of living and nonliving things that interact in one place. |
| organism | A living thing, such as a plant, animal, or person. |
| habitat | The natural home of a plant or animal. |
| environment | The surroundings where living things live and grow. |
| interdependence | When living things depend on each other and on their environment. |
Show one ecosystem image and ask: What living and nonliving things do you notice? How might this place affect health? Record a few responses.
Observe the image, name details, and share quick ideas about how the place might help or hurt health.
Define ecosystem and connect it to health. Explain that plants, animals, water, soil, and sunlight work together. Emphasize that healthy ecosystems provide clean air, clean water, food, and spaces that can reduce germs and pollution.
Listen, repeat key vocabulary, and answer short teacher questions.
Lead a whole-class sorting activity. Read or show examples such as trees, insects, rivers, trash, sunlight, soil, and people. Ask students to decide whether each is living or nonliving and whether it helps keep an ecosystem healthy or unhealthy.
Participate by raising hands, giving reasons, and helping sort items into categories.
Ask: What happens to people if an ecosystem becomes polluted or damaged? Guide students to connect ecosystem health to water safety, food supply, and disease spread.
Share cause-and-effect ideas using complete sentences.
Summarize: Ecosystems are connected systems, and when they stay healthy, people stay healthier too. Ask students to write or say one action that protects an ecosystem.
State one protective action such as recycling, conserving water, planting trees, or not littering.
Reinforce that ecosystems are connected and that healthy ecosystems support human health through clean air, clean water, food, and safer living spaces. End by asking students to share one way people can protect an ecosystem.