In this comprehensive instructional activity unit, students examine how overfishing has affected Chesapeake Bay's ecosystem. They will study food webs from the past and present and graph related data.

Create the parameters of your own ecosystem by choosing which producers and consumers live there. Visualize how the food web operates and species populations change. This simulator mimics the food web within a typical ecosystem and gives...

This activity allows learners to make a simple model food chain and observe how toxic chemicals can become concentrated in the bodies of consumers at the top of the chain.

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

Describes the characteristics of a tundra biome, how a tundra food chain compares to a tropical food chain, and what the different trophic levels look like.

Biological magnification is the term used to described the increasing accumulation of substances in organisms as one looks at higher trophic levels in a food chain. When that substance is a toxin, such as a heavy metal or a pesticide,...