The purpose of this activity is for students to discover how the absence of wolves impacted the Yellowstone National Park ecosystem. Students will explore the concepts of a trophic cascade through a short video clip and through a brief analysis of data from a scientific study conducted in the park after wolf reintroduction in 1995.

*Contains images taken by me at Yellowstone National Park in 2022, including a selfie. Feel free to edit as needed for your class.

**this also utilizes a youtube video link.