Earthquakes along the San Andreas fault zone, for example, are repetitive—they reoccur in roughly the same regions over and over again—separated by decades or centuries because ________
A) plate boundaries move at regular rates so the interactions across plate boundaries are predictable and regular
B) stress continues to build up all the time and when it is great enough to overcome friction there will be an earthquake and then the process will start over again
C) there are areas that are weak and always break when small amounts of energy are applied to them
D) faults are always moving or creeping so an earthquake will occur whenever two sides meet that have the right properties for an earthquake
B
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Why should a student on a field trip in Yosemite National Park assume that a piece of rock, that when under a microscope shows tiny crystals, is basalt?
A) Basalt forms in lava flows. B) Basalt forms underground. C) Basalt is green. D) Basalt is always hot.
In 19th century, geologists developed the geologic time scale using
a. fossils. b. radiometric dating techniques. c. absolute ages. d. the principle of uniformitarianism.
If the Nonconformity is simplified as three steps:
(1) New sedimentary layers accumulated above the erosion surface; (2) Erosion cuts down into the crystalline rock; (3) A pluton intrudes; then what is the right sequence for these steps? a. (3), (2), (1) b. (1), (2), (3) c. (2), (1), (3) d. (2), (3), (1)
What is the predominant soil order in the area in which you live? Describe the activities that occur on these soils that reflect the characteristics thereof
What will be an ideal response?