Hiking Related Science Project?

Hi all. I am a 10th grade student, and at my school, in Sophmore year 
it is required that you participate in Science Fair. I am 
brainstorming ways to integrate hiking into my project. I am looking 
for any ideas or suggestions you may have. So far I have thought of a 
few: 
Extensive stove testing, with different designs and using different 
materials 

Weight vs effiency while hiking (packweight vs calories burned?) 

Possibly material testing for waterproofness and breathability ( I 
have no idea as to how to go about this) 

Any thoughts? I'd try to make my results available to the hiking 
community in the form of a web page or downloadable file. ALL ideas 
are welcome. Thanks alot. 

Happy hiking 
Chad L. 
(sorry for the cross post)