Earth:
A Human Concern
Study Questions

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  1. Why is the African Elephant considered the keystone species in its ecosystem? (check all that apply)
  1. They control secondary succession and prevent grasslands from turning into forests.
  2. They are the "center" of a large food web.
  3. They disperse seeds in their dung.
  4. Without the elephant, the grassland ecosystem would not exist.
  1. Real costs include: (check all that apply)
  1. sickness
  2. environmental costs
  3. costs of manufacturing a product
  4. land deterioration due to mining
  5. wholesale and retail costs
  1. Chlorofluorocarbons break down:
  1. nitric acids
  2. NOX
  3. SOX
  4. photochemical smog
  5. ozone
  1. Commercial nitrogen fertilizers can become soil and water pollutants.
TRUE
FALSE
  1. The Consumption Philosophy incorporates real costs.
TRUE
FALSE
  1. Ozone depletion will have little effect on skin cancer and eye cataract concerns.
TRUE
FALSE
  1. Ozone is often characterized as a "weed" (a plant out of place).
TRUE
FALSE
MATCHING:
(use lower case; incorrect responses will be replaced with a "?".)

8. consumption philosophy a. ecosystem preserver

9. stewardship philosophy b. use wisely

10. keystone species c. health, structural damage

11. real costs d. use without restraint
B   R  I   G   H   A   M            Y   O   U   N   G       U   N   I   V   E   R   S   I    T   Y