Debris flows typically:
a. leave levees.
b. occur so slowly that motion cannot be witnessed by observers.
c. involve little water.
d. move along a curved plane of slippage.
e. occur by free fall through air.
A
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The author states that “the principle scholarly contribution of the book is the concept of ecological dialogue.” Briefly explain what is meant by ecological dialogue and give an example or illustration.
What will be an ideal response?
The most abundant natural greenhouse gas in the Earth's atmosphere is
A) methane (CH4). B) carbon dioxide (CO2). C) ozone (O3). D) water vapor (H2O). E) nitrous oxide (N2O).
The bite of a brown recluse spider:
A) may not result in immediate symptoms but generally presents as a painful, reddened area with an overlying blister. B) manifests with immediate and intense pain and the formation of a blister and a white surrounding area of ischemia. C) most often causes severe central nervous system depression because its venom contains a powerful neurotoxin. D) results in a local reaction only because the spider's venom is cytotoxic and spreads slowly throughout the bloodstream.
The Intergovernmental Panel on Climate Change has issued which of the following statements?
A) Climate change models can mimic present-day conditions only if human emissions are taken into account. B) Human climate alterations have not yet produced significant impacts on biological systems. C) Ocean acidification is not a problem because the ocean does not absorb carbon dioxide gas. D) Recent regional climate changes have not yet affected physical systems on Earth. E) The temperature increases observed since the mid-20th century are very likely due to natural causes.