Educational worksheet on ecosystems featuring a freshwater lake diagram with biotic and abiotic components, designed for students to learn about ecological relationships and food chains.

A worksheet titled "Research an Ecosystem" showing a diagram of a freshwater lake ecosystem with labeled biotic and abiotic components, including organisms like fish, birds, and plants, and nonliving elements like sunlight and water. The worksheet includes sections for students to identify the ecosystem, its location, abiotic and biotic factors, and to create food chains.