• What are the different parts of an ecosystem?
    • How does the environment limit the size of a population?
    • What is the difference between the habitat of a species and its niche?
    • What are the types of relationships that link all the different species of an ecosystem together?
    • How does the energy, supplied initially by the sun, get passed to all living things?
    • How are limited resources in the ecosystem recycled so that they can be used again?
    • How does an increase in biodiversity stabilize an ecosystem?
    • How do habitats change over time?