No species lives alone. To find out what one species does to another, take one away and watch what happens.
Printable student worksheet (PDF) · two pages, goes with this lab
Low-write worksheet (PDF) · same questions with tick boxes, word banks and worked examples
Teacher guide: NYSSLS, SEP and CCC alignment (PDF)
This is a model. Real numbers go up and down with weather, disease and luck. The model leaves those out so that each run gives the same answer. Environmental Science, Chapter 5: How Do Species Interact?