Interactions Among Living Organisms

Life has its ups and downs ... especially if you're an animal! Biology scholars engage in a population study through an inquiry-based instructional activity. Pupils work together to explore the factors that affect deer populations, then...

Nature provides density columns in the polar regions that provides food for many animals. Young scientists build their own density columns with water in order to answer analysis questions. Through a slideshow presentation, scholars...

Young biologists identify how plants and animals are affected by changes in their ecosystem and environment.  The concepts of succession, maintenance of habitats, interrelationships, and adaptation are all discussed. This well-developed...

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....

How does a population's habitat determine the size of that population? Teach learners about carrying capacity and limiting factors with an engaging roleplay activity. Class members pose as a colony of penguins who must gather food amidst...

Students perform an experiment to measure the density of tap water vs. salt water.

A video explaining how the biological carrying capacity is calculated to show the number of an organisms a healthy ecosystem can support. Site also includes lesson plans with activities to go along with video. [4:34]

Students control the environments in four different scenarios to discover how any changes might affect populations. The different simulations include microorganisms, rabbits, foxes, and other organisms.

Elementary ecologists pretend to be migratory hummingbirds. They fly between wintering and nesting grounds, trying to reach a habitat haven. In a musical-chair fashion, some birds will miss out, and are removed from the game. To further...

[Free Registration/Login may be required to access all resource tools.] For a population to be healthy, factors such as food, nutrients, water and space, must be available. Limiting factors are resources or other factors in the...