Multiple Choice, 4 pts each:

1. A sustainable economy should consider a ________ system that includes ________ costs.
   1. A. closed-loop, external (BRILLIANT!)
   2. B. linear, external (incorrect!)
   3. C. closed-loop, internal (incorrect!)
   4. D. linear, internal (incorrect!)
   5. E. open-loop, intrinsic (incorrect!)
      Hint
2. Total Fertility Rate (TFR) is
   1. A. birth rate plus life expectancy (incorrect!)
   2. B. birth rate minus death rate (incorrect!)
   3. C. birth rate minus infant mortality rate (incorrect!)
   4. D. the total number of children a woman bears over her lifetime (AWESOME!)
   5. E. rate of growth of a population (incorrect!)
      Hint
      Chap 5 Self Quiz

Fill In (one to three words), 4 pts each:

3. Populations of several species living and interacting in one area comprise a(n)                       .
   Hint

Extra Credit, 4 pts each:

4. Which of the following return carbon to the atmosphere in the carbon cycle?
   1. A. producers only (incorrect!)
   2. B. consumers only (incorrect!)
   3. C. decomposers only (incorrect!)
   4. D. consumers and decomposers (incorrect!)
   5. E. producers, consumers, and decomposers (YIPEE!)
      Hint