Although muscovite, feldspar and quartz are not considered useful as index minerals, which of the following situations could be useful in determining the grade of metamorphism in a region?
A) the coexistence of muscovite, feldspar and quartz
B) the disappearance of rocks containing muscovite and quartz
C) the coexistence of feldspar and quartz
D) the disappearance of rocks containing quartz
Answer: B
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What is the least expensive and most effective way to protect groundwater?
A. Pump it to the surface, clean it, and return it to the aquifer. B. Inject microorganisms to clean up contamination. C. Pump nanoparticles of inorganic compounds to remove pollutants. D. Use methods to prevent contamination. E. Use bottled water as a substitute.
What type of stream pattern would you expect to develop in a stream that had a low bedload to suspended load ratio, a higher percentage of finer grained sediment, stable banks, constant discharge and a low channel slope?
A) highly meandering pattern B) moderately meandering pattern C) mixed meandering and braided pattern D) moderately braided pattern E) highly braided pattern
Which of the following reactions involves the addition of different groups to the two ends of a double bond?
A) hydration B) hydrogenation C) both a and b D) neither a nor b
The overlapping area between two major plant-dominated ecosystems is:
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