Here you have an useful "prezi", specially prepared for students (2 ESO, Natural Sciences) to study the unit about "Ecology and ecosystems".
These are the topics:
- Ecology.
- Ecosystems.
- Biotic and abiotic components.
- Ecological levels of organization.
- Flow of energy and food: producers, consumers and decomposers.
- Food chains and food webs.
Enjoy it!