What features did Dr. Ballard not encounter during his National Geographic exploration to the midocean
ridge?
a. the rift valley
b. faults and fractures
c. lava flow
d. tube worms
ANS: D
Dr. Ballard traveled 9100 ft in Alvin to observe the structure of a mid-ocean ridge including the rift
valley, fissures, cracks, and faults, and lava flows. Information can be found in the section Insight
from A National Geographic Explorer: Dr. Ballard recounts an expedition to a mid-ocean ridge.
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Over the past two decades, the harvesting of fuelwood has
A) increased and is causing a worsening problem of deforestation and erosion. B) declined, as developing nations use charcoal and fossil fuels and has become less of a threat to ecosystem sustainability. C) become a major industry in the United States, especially in urban areas, replacing fossil fuels in many regions. D) shifted from productive to consumptive use.
Which of the following is true regarding the depletion of ozone in the ozonosphere?
A) The depletion is restricted to the arctic and antarctic regions. B) It results from chemical reactions with chlorine derived from CFCs. C) It results from the burning of fossil fuels. D) The notion that ozone is being depleted as a result of human activity has little scientific evidence to support it.
Most of the highways of South America are concentrated on the ________ and connect ________
A) coast; large cities B) mountains; mineral deposits C) rivers; ports with indigenous tribal areas D) plateaus; clusters of small towns
Larry Summers shared his opinion that it made perfect economic sense to encourage the movement of dirty industries to poor countries. He argued that residents of less developed countries were less likely to be concerned about the environment and if they suffered negative health effects from pollution, the economic cost would be lower since their wages were so much lower. These actions could be classified as ________.
A. environmental discrimination B. environmental racism C. enviro profit margins D. an example of the exploitation theory