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A food web is a model that shows a complex network of food chains in an ecosystem. In this activity, you can click on an organism in the arctic food web to see its relationship to other organisms and abiotic factors. Watch National Geographic footage…

EcoDefenders is an interactive game that explores the science of invasive species. Use your knowledge of ecosystems, adaptations, and competition to design a simulation of an invasive species. When invading species occupy the same ecological niche as…