The Clark's nutcracker bird hides seeds in 25,000 different sites every year to save for winter. Lesson demonstrates how difficult it would be to find these seeds months later when they need them for food. In the first of five lesson,...

Take it all the way back! Young scientists discover the changes that took place from the time Earth became solid to present day through an interesting interactive. The resource guides users through key events that have shaped our world...

Students participate in a series of activities designed to demonstrate the differences between symbiotic and parasitic relationships. They discuss the differences and catergorize man's relationship with nature.

Students role-play how animals and plants depend on and help each other in symbiotic relationships. Working in pairs, they role-play the animals' relationship. They may also choose to draw pictures of these partnerships.