Go with the Flow
Appropriate for middle and high school Earth science, ecology and environmental science classes. Does more water flow out of a watershed when trees are removed? By graphing and analyzing data to answer this question, students will think about the role that trees and transpiration play in the water cycle. Go with the Flow is a multi-part lesson, and all or parts of it may be used. The graphing exercise is the heart of the lesson, but an introductory slideshow and reading (with questions) are also provided, which provide important background information on the Hubbard Brook Experimental Forest, ecosystem-level experimental design and the water cycle.