Presentation on theme: "BEAVER, ELK, and TREES in YELLOWSTONE PARK An Interactive PowerPoint Experiment."— Presentation transcript:
BEAVER, ELK, and TREES in YELLOWSTONE PARK An Interactive PowerPoint Experiment
Teachers – Before viewing the slide show, right click on the document below. Go to Document Object and select Open. Print out worksheet and have students complete while viewing the PowerPoint.
INSTRUCTIONS You will need to take data in order to analyze what is going on and to answer questions at the end of the lesson. Pay attention to what is happening to the population of beaver, aspen, willow, and conifers. As the years go by, mark with a plus (+) if the population increases, and a minus (-), if it decreases.