This activity has been selected for inclusion in the CLEAN collection.
This activity has been extensively reviewed for inclusion in the Climate Literacy and Energy Awareness Network's collection of educational resources. For information the process and the collection, see http://cleanet.org/clean/about/selected_by_CLEAN.
This activity was developed along with a set of web pages about a pedagogic technique.
This activity was developed along with a set of web pages about a pedagogic technique. Both the activity and the supporting web pages were peer reviewed by two reviewers prior to being made available to the public. To learn more about the review criteria for this process, see http://serc.carleton.edu/sp/howto/design.html.
This page first made public: Jun 1, 2007
This material was originally created for Starting Point:Introductory Geology
and is replicated here as part of the SERC Pedagogic Service.