In 1962 environmental costs amounted to approximately 1 trillion dollars. By 2002 environmental costs had:
a. Quadrupled.
b. Stayed the same.
c. Tripled.
d. Doubled.
Answer: a. Quadrupled.
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Carbon and hydrogen are NOT
A) important elements for sustaining life. B) major components of the foods that plants produce (carbohydrates) and that animals consume. C) the major components in fossil fuels. D) key factors in the hydrologic cycle.
Discuss the silled (barrier) basin model for evaporite deposition. What features of evaporites does this model explain? What will be an ideal response?
Match the soil horizon with the correct definition
A) Accumulation of clay particles from upper layers B) Partially altered parent material that is easily identifiable C) Composed of a mixture of humus and mineral material D) Consists largely of organic material, still identifiable in uppermost layer E) Light-colored, depleted of soluble materials, little organic material 1) O horizon 2) E horizon 3) C horizon 4) A horizon 5) B horizon
Why is it difficult for tobacco farmers to convert to farming other crop types?
A) Tobacco is a labor intensive crop B) Tobacco farms are small C) Tobacco tends to make the soil unusable for other crops. D) Both A and B E) Both B and C