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An anyone suggest:
 
a simple way to define the concept of Ph level as it affects the health of  
streams (how do you explain acidic versus basic in just a few words)?
 
citizen science stream monitoring programs appropriate for kids ages  8-12?
 
Thanks so much,
 
Lisa Rudy  

 
Lisa Jo Rudy, Writer/Consultant
625 Chelten  Hills Drive
Elkins Park, PA 19027
_www.lisarudy.com_ (http://www.lisarudy.com/) 
215-635-9735

_About  Guide to Autism_ (http://www.autism.about.com/) 









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