1. System of interconnected stream channels found in a drainage basin?

2. A boundary the separates dry and moist air in the warm sector of a mid-latitude cyclone wave. Found ahead of the cold front?

3. Thin vertical veins of igneous rock that form when magma enters and cools in fractures found within the crust?

4. Climatic condition where water loss due to evapotranspiration is greater than water inputs through precipitation?

5. A wind common to mountainous regions that involves heavy cold air flowing along the ground from high to low elevations because of gravity?

6. A ___?___ occurs when a system displays unrepeated average states through time?

7. Is a landform formed from the deposition of weathered and eroded surface materials?

8. Drainage pattern that is highly irregular. Areas that have experienced continental glaciation may have this type of drainage pattern?

9. Conversion of marginal rangeland or cropland to a more desert like land type?

10. A veneer of coarse particles left on the ground after the erosion of finer particles by wind?

11. Geologic period that occurred roughly 360 to 408 million years ago. During this period, the first amphibians and trees appear?