Describe and discuss the methods for deriving absolute geologic dates. How have these methods influenced the
geologic time scale? Discuss possible sources of uncertainty in dates determined using these methods. What will be an ideal response?
The student should discuss various radiometric dating systems, including radiocarbon dating,
uranium-lead, rubidium-strontium, samarium-neodymium, and potassium-argon. Especially
important is recognition that different half-lives for these systems allow them to date a
variety of events in the geologic record. Fission-track and tree-ring dating should also be
discussed. The student should also discuss effects of metamorphism on radiometric dating and analytical uncertainties in chemical analyses.
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Fossils of Archaeopteryx are important because they ____
a. prove that dinosaurs could fly b. indicate birds may have evolved from theropod dinosaurs c. indicate theropod dinosaurs may have evolved from birds d. indicate some dinosaurs were warm-blooded e. show that small dinosaurs had feathers
How is porosity different from permeability?
What will be an ideal response?
The laws enacted in 1573 that specifically outlined how colonial Spanish cities were to be constructed were called the
A) Bills of the Americas. B) Laws of the Indies. C) American Indian Laws. D) Colonial Center Laws. E) Laws of the Real Corona.
In general, warm, wet climates allow for fast formation of soils primarily because
A. chemical weathering proceeds at rapid rates. B. parent material found in warm, wet climates tends to allow it to break down faster than the types of parent material found in colder climates. C. there is less biological activity in warm, wet climates than elsewhere. D. physical weathering proceeds at rapid rates.