The vertical igneous feature shown in this photograph is a
A. dike.
B. volcanic neck.
C. sill.
D. batholith.
Answer: A
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As the number of working adults in the United States declines in proportion to the number of senior citizens so will
a. the process called the graying of America b. the tax revenues necessary for supporting the growing senior population c. the need for Medicare d. the crude birth rate e. the crude death rate
A vesicular felsic rock is called a:
a. pumice. b. scoria. c. obsidian. d. tuff. e. volcanic breccia
Dropsondes
A) are released from aircraft flying above midlatitude cyclones. B) are carried into the atmosphere by large balloons. C) provide critical information for computer models used to forecast hurricanes. D) are used to assess damage in the aftermath of a hurricane.
Most worldwide maps are ________ projections and are an optimal portrayal of worldwide distributions.
a. gnomonic b. conformal c. azimuthal d. equivalent e. conic