Explains what a primary consumer's role in a food chain is and provides examples.

Understand how organisms acquire energy and how that energy is passed from one organism to another through food webs and their constituent food chains.

Explains the characteristics of tropical and temperate rainforests and what rainforest food webs look like.

Detailed explanation of the processes by which energy flows through an ecosystem. Scroll down and open Section 3.

This overview of feeding relationships illustrates to students the trophic levels of different organisms in an ecosystem. Hover the mouse over different terms to see their definitions.