Along came a spider, who sat down beside her. She screamed, but RJ wouldn't smash it because spiders are a limiting factor for other insects in an ecosystem. In this video, other common limiting factors for populations are listed....

In this ecology vocabulary exercise:  wetlands worksheet, students read the definitions of 8 words, then categorize a species found in a wetland in their region.  This page has numerous links to helpful web resources.

In this ecology community status worksheet, students research their state's ecosystem, make a chart of the biodiversity, analyze the chart and identify issues with wetland species.  This page has several links to helpful web resources.

In this ecology worksheet, students read the vocabulary words and then categorize a species found in a field, meadow, or fencerow in their state or region. Students complete 6 problems.

Three types of symbiosis are explained: parasitism, commensalism, and mutualism. This is done with colorful animation and lively dialogue in a straightforward and easy-to-follow manner. Have your ecology class watch this at home and then...

In this bluebirds worksheet, learners categorize bluebird species found in their state and define vocabulary related to it. Students complete 6 vocabulary words.

Create the parameters of your own ecosystem by choosing which producers and consumers live there. Visualize how the food web operates and species populations change. This simulator mimics the food web within a typical ecosystem and gives...

Learn what happens to different populations of organisms as their ecosystem changes. Design your own experiment and make your own guesses with what the result will be with this virtual ecosystem. Also experiment with producer/consumer...

Build your own ecosystem, and explore the effects of these interrelationships.

Adjust the number of fish in a lake to be tagged and the number of fish to be recaptured. Use the number of tagged fish in the catch to estimate the number of fish in the lake. (Free usage is limited to five minutes per day.)