Ecosystem: Class 1 to 12 Progression
| Class | Ecosystem-related concepts to study |
|---|---|
| Class 1 | Plants and animals around us; living and non-living surroundings; basic observation of nature |
| Class 2 | Plants, animals, habitats and surroundings; dependence on the environment |
| Class 3 | Living things, food, plants, animals and their surroundings |
| Class 4 | Different habitats, adaptation, food and interdependence |
| Class 5 | Plants and animals, habitats, food chains and environmental relationships |
| Class 6 | Components of surroundings; living and non-living components; habitats and adaptation |
| Class 7 | Nutrition in Plants & Animals, forests, organisms and their surroundings; interdependence |
| Class 8 | Microorganisms, conservation of plants and animals, pollution and environmental relationships |
| Class 9 | Natural Resources; air, water, soil, biogeochemical processes and environmental interactions |
| Class 10 | Our Environment — ecosystem, food chain, food web, trophic levels, energy flow, decomposers, biological magnification and ozone-related environmental issues. N Class 10 Science material explicitly includes ecosystem, food chains, decomposers and related environmental concepts. |
| Class 11 | Ecology foundations — organisms and populations, population interactions, communities and ecological relationships. |
| Class 12 | Ecosystem – complete treatment: ecosystem components, productivity, decomposition, energy flow, ecological pyramids, nutrient cycling and ecological succession. The current Biology contents place Chapter 12: Ecosystem within Unit X: Ecology. |
For a PGT/TGT Biology or General Science preparation page, I would organize the topic in this progression:
1. Environment & Habitat
→ 2. Biotic and Abiotic Components
→ 3. Ecosystem
→ 4. Food Chain
→ 5. Food Web
→ 6. Trophic Levels
→ 7. Energy Flow
→ 8. Ecological Pyramids
→ 9. Productivity
→ 10. Decomposition
→ 11. Nutrient Cycling
→ 12. Ecological Succession
→ 13. Ecosystem Services & Environmental Issues
