1. 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 _______

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

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

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

5. 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 ______ & _______

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