PBS
Pbs Teachers: Scientific American: Dragon Science: Dams and Dolphins
Explore environmental impact of building of a dam in China's Yangtze River on endangered fresh water dolphins. Observe the presence and effects of osmotic pressure, measure and compare sedimentation in a waterway and build a turbine.
Ducksters
Ducksters: Environment for Kids: Wind Power
Kids learn about wind energy and how this renewable power can help the environment. Teach students about turbines that generate electricity from the wind.
Science Struck
Science Struck: Methods of Generating Electricity
Provides brief descriptions of the different methods used to generate electricity.
PBS
Pbs Teachers: The Dam Challenge
Explore different types of dams and the forces that act upon them, then choose the design of dam that best fits the needs of a town.