How large can a population become? The fifth installment of a nine-part unit teaches young ecologists about limiting factors that determine the carrying capacity of species in the Sonoran Desert. Here is a PowerPoint to help present this...

Ecology aces examine sea surface temperature maps and relate temperatures to concentration in fish and zooplankton populations. Take your class to a computer lab and provide experience with actual remote sensing data. Some of the links...

Ninth graders conduct an environmental inventory on one ecosystem. They collect data, and write an environmental impact statement on that area. Students explain the interactions between different systems found within an ecosystem....

Great things come in small packages! What better way to illustrate this point than a week-long look at nanotechnology? Earth science scholars explore water quality issues through lab activities, then research new innovations in nanotech...

Second in a series of five lessons, this lesson encourages preteens to consider cities as urban ecosystems. First, they keep a food diary for a few days. They visit the Natrional Agricultural Statistics Service website for current data...

Tenth graders conduct a critical analysis of current evolutionary concepts. They describe how scientists continue to investigate theories. Students examine examples with experimental data that suggest alternative methods of species...