Young scholars observe the effects of pollution on living organisms. In this pollution lesson plan, students observe fresh water Hydra and look at their structures and movement. They place samples of pond and lake water on the Hydra and...

Students study the structure and habitat of the hydra in this lab instructional activity. Students determine if the hydra can be used as an indicator to detect pollution from automobile exhaust.

Photograph of a green hydra.

Diagram of a hydra, with parts labeled.

Drawing of a hydra with a bud which will ultimately form a new hydra.