Essential questions you should be able to answer:
1. Identify the parts of an ecosystem, like biotic and abiotic factors, biological community, population, niche, and habitat.
2. Classify types of symbiosis and identify the host if present.
3. Describe how each trophic level obtains energy and how energy is transferred / transformed through those levels.
4. Describe how matter (elements/compounds) are cycled through the environment.