1. Courtney Beamer Dr. Simpson APES 27 March 2012 http://yoursinfo.com/list-of-online-english- dictionary-sites

2.  A worldview that places equal value on all living organisms and the ecosystems in which they live http://library.thinkquest.org/04oct/01590/humans/enviroworldview.ht ml

3.  The study of economics as a component of ecological systems http://energy-crisis-of-i.blogspot.com/2009/05/political- secession-and-economic.html

4.  The proportion of consumed energy that can be passed from one trophic level to another http://cde.nwc.edu/SCI2108/course_documents/earth_moon/ea rth/earth_science/biosphere/ecology/ecosystem_eco.htm

5.  A measure of how much an individual consumes, expressed in area of land http://www.verdesenalianza.org/how-big-is-your-ecological- footprint.html

6.  The replacement of one group of species by another group of species over time http://www.physicalgeography.net/fundamentals/9i.html

7.  An approach to removing trees from forests in ways that do not unduly affect the viability of other trees http://www.reliableprosperity.net/forestry.html

8.  The observation that the average costs of production fall as input increases http://www.wikinvest.com/wiki/Economies_of_scale

9.  A particular location on earth distinguished by its mix of interacting biotic and abiotic factors http://www.nps.gov/pete/forteachers/life-in-an-ecosystem.htm

10.  The variety of ecosystems within a given region http://www.epa.gov/eerd/GeneticDiversityIndicators.htm

11.  A keystone species that creates or maintains habitat for other species http://www.sciencedaily.com/releases/2011/01/110103110331.htm