It is possible for a layer of air to be convectively unstable and absolutely stable at the same time
a. True
b. False
ANSWER: True
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The diffusion of jeans is a good example primarily of the
A) diffusion of popular culture. B) adoption of unique folk culture. C) impact of high income on clothing habits. D) opposition to globalization. E) synthetic textiles replacing natural fibers.
Which of the following best matches the description?Heat energy from the earth's core.
A. liquefied natural gas B. black lung disease C. overburden D. geothermal energy E. resources F. underground mining G. secondary recovery H. nonrenewable energy sources I. reserves J. renewable energy sources K. acid mine drainage L. active solar system M. surface mining N. photovoltaic cell O. passive solar system
Fully ________% of the U.S. and Canadian populations were classified as urban in the first decade of the twenty-first century
A) 50 B) 68 C) 72 D) 80
Communities of life exist on the seafloor that are correlated with the origin of life on Earth. Why?
a) early Earth's atmosphere was similar to many elements that seep from vents on the seafloor b) abundant energy and uniform condition are at these vents. c) chemosynthesizing bacteria utilize the resources at the vents. d) only B and C e) all of the above