Why might the infiltration of water deep into a slide mass increase landslide hazards?
A) Deep infiltration forces vegetation to root more deeply.
B) Water will erode the subsurface materials, reducing strength of the slide mass.
C) Water in the deep subsurface influences soil formation, leading to shallow soil slips.
D) The water increases the pore water pressure, effectively lifting the slide mass from stable ground beneath.
D
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Oceans
a. have three major life zones b. occupy most of the earth's surface c. are thoroughly understood by humans d. have three major life zones and are thoroughly understood by humans e. have three major life zones and occupy most of the earth's surface
Cold fronts that move into the United States from the east, or northeast, are called ____ fronts
A) eastern B) back door C) stationary D) warm-type occluded
During the Cold War, which region of Europe contained the "satellite states?"
A) northwestern Europe B) eastern Europe C) southern Europe D) northern Europe E) central Europe
A trickling filter system is generally used
A. to remove small objects. B. to remove phosphorus. C. to increase the amount of sewage sludge. D. to remove dissolved organic matter.