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American Chemical Society
American Chemical Society: Explore Chemistry: Water and Chemistry
Explore water's unique properties in the activities here. Includes ideas for starting a chemistry club, ideas for Earth Day, articles, and videos.
Other
Center for Science Education: Eye on the Sky: What Makes Day and Night?
This activity will allow you to model day and night cycles. A rotating student holding a map (provided) models the earth. A lamp is used to model the sun. Numerous worksheets (pdf) and additional website resources are also provided.