Young biologists trace the path of the sun's energy through marine ecosystems in the second part of this four-lesson series. Building on prior knowledge about producers, consumers, and decomposers students are introduced to the...

In this biodiversity activity, students sort and classify animals by their observable features using a dichotomous key. Students then respond to questions about complete and incomplete metamorphosis.

This site gives an in-depth description of a vulture, including its behavior, appearance, and classification. The site includes photos and illustrations and an interactive quiz to test your understanding.