Curated OER
Water Ecosystems
Freshwater and Saltwater ecosystems are the focus of this Earth Science PowerPoint. Presentation is full of interesting facts, photographs, and maps. A slide with review questions appears at the end of the presentation. Very nice!
Curated OER
Lotic Environment
Students assemble a classroom river model as an example of a lotic system. They control and measure biotic and abiotic information for the in-class system and compare data with a lotic system in a natural environment.
Curated OER
Determination of Overall Water Quality Using a Quantitative Macroinvertebrate Survey
Young scholars examine water samples from a local stream. They identify various types of macroinvertebrates found in that water ecosystem and perform a quantitative macroinvertebrate survey to determine the stream's water quality.
PBS
Nh Pbs: Nature Works: Ecosystems
How would you define an ecosystem? Check out this educational resource to learn more about the living and nonliving parts of different ecosystems.