4.2 Energy Flow in Ecosystems I. __________ Levels A. Primary source of _______ = _____ _____ B. ___________ 1. Use sun’s energy for ______________ 2. The basic ______ source for an _________ C. ____________ 1. Eat other ____________ 2. Don’t produce own _______

D. ______________ 1. __________ & ________ break down remains of _______ plants & animals E. Energy flows from _____ to __________ to ____________ to ____________ 1. __________ levels a. each ______ of energy transfer

F. Food Chains 1. 1st level – ___________ 2. 2nd level – ___________ (eat _______) 3. 3rd level – __________ (eats ________) 4. 4th level – ______ _________(eating ________ _________) 5. _________ – animals that eat _______ and other _________

G. Food ________ 1. In most ecosystems ________ does not flow in a ___________ chain 2. Organisms _____ more than _____ kind of ________

II. Loss of Energy A. Energy is ________ at each link of a ______ web B. Only ___% of energy from consumed ______ becomes part of the ___________ 1. ____% is wasted as ______ & _______

C. Energy ___________ 1. a _________ diagram that shows the ecosystem’s ______ of energy 2. Each ________ represents one ________ level 3. _________ make up the _______ level