Chapter+13+resources

=**__Chapter 13 Resources!!__**=
 * 1.Chatper 13.1 (-Ecologist study relationships-)**
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 * 2.Chapter 13.2 (-Biotic and Abiotic Factors-)**
 * Site:**[]


 * 3.Chapter 13.3 (-Energy in Ecosystems-)**
 * Site:**[]


 * 4.Chapt****er 13.4 (-Food Chains and Food Webs-)**
 * Site:**[]


 * 5.Chapter 13.5 (-Cycling of Matter-)**
 * Site:**[]


 * 6.Chapter 13.6 (-Pyramid Models-)**
 * Example:**