1. Leaf Litter Biodiversity Wrap-up Which hypothesis did you test? Did your result support your hypothesis? What should you do if they didn’t??

2. Lab 8: Soil Invertebrates What lives in leaf litter?? What factors might affect the diversity of this community? How should we measure diversity?

3. Thinking About Ecology What is Ecology? “To keep every cog and wheel is the first precaution to intelligent tinkering.” - Aldo Leopold

4. Open and Closed Systems Is the Earth an open system with respect to matter? (What about energy?)

5. The Hydrologic Cycle

6. Atmospheric Cycling: CARBON

7. The Greenhouse Effect

8. Greenhouse Gases Source: Hanson & Soto, December 18, 2002 issue of the Proceedings of the National Academy of Sciences